I have been reading this forum everyday for several months now and
have really enjoyed what people have to say. I want to tell you about
what kind of photography I do and see if you would recommend a D300
as my first slr.
Short answer: No.
Long answer:
It's terribly easy to rationalise an extravagent and indulgent purchase, and that's what I see in your post: you convincing yourself that you are justified in purchasing an expensive high-end camera because the D40 is 'too small' (I read: "too cheap and bottom of the range; I wouldn't feel special enough buying one") and the D80/D200 are 'out of date' (I read: "Basically I just want to know I've got the latest and greatest so I can relax"). It's the same with your insistence that you want to buy something you can keep for years and years, not one body now and another next year: the actual net cost of buying and selling a stopgap D40 is almost negligable; the real reason you want to buy one camera and keep it forever is
that means you get to buy the D300 now .
Please, do not be offended - I'm only familiar with these signs because I invariably exhibit them myself whenever something new and shiny appears on the market
I think at the moment the choice of camera body is dominating your purchasing plans, and it shouldn't. You need to take your budget, think seriously about what combination of equipment, including lenses, lighting, tripod, memory cards etc, is going to suit you best, and take pride in having a great
suite of tools at your disposal.
From your description of the kinds of photography you currently pursue, I would say the following:
1. Lots of indoor shots - social pictures judging by the questions regarding DSLR portability you raised later.
Here you need a
good short range prime or zoom, and a great flash (SB600/800). In a typical indoor social situation, a D40 using bounce flash at ISO 200 and F8 will make the guy who brought his D300 but forgot his flash look like a complete idiot. Mr D40 will take a series of crisp, well-exposed and appealing shots with natural and flattering lighting, while Mr D300 will most likely alternate between struggling to tame tungsten-lit ISO3200 at F2.8 while keeping everyone in focus, or using in-camera flash to chronicle yet another 'who can look the most caucasian in an inexplicably dark room' championship indistinguishable from anything a decent P&S could produce.
2. Macro shots.
This is all about the lens. Tripod live view is great, but unless you're photographing moodily lit wristwatches for a living, it's a nicety you can live without, unlike the
tripod . Mount up, then blaze away and pick the best later. Any DSLR body will give great results with the right lens.
3. Outdoor photography.
Here you're talking lenses (again), a good solid (and light) tripod for landscapes, a proper weatherproof bag to tote everything around in - again, your camera body isn't the star of the show.
The only D300 specific feature that would genuinely benefit you is the LCD. Even in a social situation it pays dividends: the ability to turn that great black brick around and show them exactly WHY you aren't using a P&S goes a long way toward defusing the 'look at the prat with the ostentatious camera' syndrome that typically attends such events. But the same can be achieved quite easily by having a less ostentatious camera and using it quickly and competently.
My advice is you get yourself a D40 or used D50, the best flash you can afford, the best lenses you can afford, learn about SLR photography, then look again at what's available and pick the pro-level body you
know is right for your needs. Heck, you might decide it's the D3, and in that case, wouldn't you feel disappointed if you blew everything on a D300 now?