I appreciate all the replies - I've read them all thoroughly, but it's become a bit too complex to reply to each comment in separate replies! So I'll fit all my replies here:
Sushieater: Yes, I've noted from several other comments, as yours, that overclocking is a great way of getting more speed out of the CPU while spending less. It's just I wonder how capable I would be to do this myself without ruining something. But I suppose with adequate research, helpful advice from knowledgeable individuals like yourself, and of course selecting a good fan, I suppose I should be capable of doing it. Hard to tell as at this stage I'm undergoing a large learning curve

As for long boot time - oh I definitely know - my laptop (which I'm dying to replace) is over 4 years old and I nearly never shut it down to get it to wake faster (just put it in hibernate). Have been told doing this is not very good for the HDD (non-SSD) but I'm not sure if that's actually the case.
I will definitely get an SSD for the OS though - I have no reason not to at this stage and it seems there's plenty of advantages.
StIves: Good to know that the graphics does not play a big part when it comes to photo editing. Also, good point re the USB slots for the motherboard. I'll probably need a handful of those, so I'll keep that in mind.
Are decent coolers really that heavy?
As for PSU, I think I will have to come to a conclusion as to what parts I will go for first, and how much overclocking I'd be doing on it... from your discussion with Sushieater it seems the choice is a little more complex than my current understanding...! (Sorry for being the reason to mess up your backup!)
While mentioning all these values for power usage though, I suppose one thing I should mention is that I wouldn't like to blow electricity fees through the roof
Ludvig: Unlikely that I would be editing video (I rarely take videos to start with), but it's good to know about the availability of faster SSDs to complement such newer motherboards. Price-wise, are they a lot more than the Samsung 850 EVO?
The issue is usually with shipping rather than the account - a lot of sellers (on Amazon UK at least) don't ship to Malta at all, or charge high shipping fees :/ To be quite honest, I've never done any in-depth searches on all the different Amazon sites, but I might do so once I've come to a conclusion as to what components I'd like to get, since you're suggesting so.
From what I've seen, there isn't such a massive price difference between the top end Haswell and Skylake i5 and i7 (in the case of the i5s, they're nearly identical on Amazon UK!). The biggest price difference remains between the top end i5 and top end i7 of both generations. Not surprisingly the most expensive option overall is the i7 6700K. I still need to establish if this price difference is worth choosing one over the other, for my needs. There seem to be quite some benefits of the Skylake and related components (thanks for that list re the chipset!), so at the moment that's what I have a slight preference for.
RyanBoston: With adequate tutorials, guides and information (if youtube is a good source for even more, I'll do some good looking around on there - so far it's been just written articles - thanks!) I don't see why I couldn't give it a go! So far the hardest bit seems to be picking the right set of components, but from all the feedback I've received here and reading online, I already have a much broader idea of what's available and possible
Nice to see you're happy with an i5! For that to make you convert from a Mac user... it must be significant...
So far I didn't look into the Haswell E series - they seemed to be super high-end (as you said) and thought they'd be a waste for my intended use. I think at this point in time it's more of a choice between the Devils Canyon and top end Skylake equivalents, although from what I've seen the latter are not that much more than their 4th gen counterparts, so might as well go for the Skylake being newer and some other things mentioned by other users. The Devil's Canyon chips do have a good reputation indeed though. Also wonder whether the choice should be between Skylake i5 6600K or the Haswell i7-4790K (or a bit more and just simply go for the best - the i7-6700K).
John Tait: I was expecting that everyone has their own experience, ideas and input. It's interesting to read and learn, and I think it's all relevant to consider. I'm sure there is no outright straight single answer, which is why I enjoy getting all the information and suggestions and condensing that into a final conclusion.
My conclusion re the graphics card at the moment seems to be that I might not need one at all to start with, and just make use of the inbuilt graphics of the CPU. I definitely don't intend on using it for any games - it's really just:
- Photo editing: Adobe Bridge, Photoshop and Camera Raw with a number of photos open at once. Possibly might get back to using Lightroom again but I've given up using that on my laptop at the moment as it lags TOO much - I open a smaller number of photos in Camera Raw at one go, but even this lags. The max set of photos I'd usually be working on is about 200-300, which I'd like to load all at once in Lightroom, but not necessarily in Camera Raw. I certainly won't be editing thousands of photos at once. When I'm using photoshop, it's usually about 2 images open at any one time and perhaps about 20 layers each. If I had a more powerful computer, I'd probably push this a little more. I have also done occasional panorama stitches on PS (about 5 photos), but it takes so long I'm rarely tempted to get working on them.
- Simultaneous general PC usage: Browser with multiple tabs, music, PDFs and slideshows for studying, programs like Skype which alone makes the CPU of my poor laptop hit the roof, etc etc.
That said, with no power hungry graphics card... I don't know what PSU would be ideal for the time being. I will ensure it's of good quality though, that's definitely good advice, so it lasts me a good while

But I suppose it wouldn't hurt to get a power supply that would allow for the adding of a low-mid end graphics card later on if the need DID arise though. Does going for a higher wattage power supply than the set-up I would have at any moment in time contribute to higher power usage, or does the computer only 'draw out what it needs' accordingly?
Yes, a lot has been said about the over-clocking. Getting the highest end i5 (most likely Skywell) and over-clocking if I find that I need more speed sounds like the best way to go at the moment. For all I know the i5 without over-clocking would be good enough as it is...! But it seems good to leave that option open by getting an unlocked i5.
Same for the RAM. I think I will indeed go for 16GB RAM since it seems to make quite a big difference to the overall performance. I did initially think 8GB would be enough, but many have stated as yourself that 16GB does help quite a bit. Getting 2x8GB would indeed leave room for even more...!
Yes - the best graphics, and issue of future compatibility with releases over the next few years are indeed a couple of the reasons why it makes more sense to go with the latest Skylake, especially with the price difference between the respective Haswell CPUs is minimal. The impression I have is it's the way forward, but then again things change so much in the world of technology. But there's also a lot of experience and happy users of the Haswells...
edispics: See my second paragraph to John Tait for a slight more elaboration of what I plan on doing with my computer

As for lifespan... I'd like to get as many years out of it as possible doing pretty much the above. Unsure of how much things will change in the next few years, but I doubt it would be much. If it works well, even when what I eventually buy starts being considered old tech, I'm pretty sure I wouldn't stay buying repeated upgrades just for the sake of it. Indeed, I'm just trying to find what works well for my needs without being overkill (both in terms of price and of course power usage).
I don't use any third party plugins.. never really heard of them to be honest! And it sounds like I don't want to be trying them without a new computer...
