17-40mm f/4L vs 16-35mm f/2.8L

Okay so I need some serious help, I am new to the forums so I very much apologize for a possible repeated question but I feel it is a on person to person basis for a lens decision so here goes nothing...

I have a newly bought Canon 60D and I'm looking for a new everyday lens for both photos and video. I want to get a higher quality lens compared to what I have now (50mm, 18-55mm, 70-300mm) but they aren't doing it for me.

What I am looking for out of a new lens:

1. Better image quality then my standard outdated lenses.
2. Wide angle for both portrait and landscapes (and portrait videos)
3. A lens which will make me look the next level of professionalism because these small lenses aren't cutting it. (Not so important, haha)

I may be asking for too much in one lens, but can you please tell me what the difference is in these two lenses that makes one double the price? I am no pro at photography but I am not a beginner either. Although I do not know much about lenses, I know more about setting up a shot then anything else. Please help!

If you can suggest any other lens which is good for everyday use that would be great too. I can afford the 17-40mm right now but I will have to wait a little longer for the 16-35mm lens. Any other info you need to know just ask because I feel like I am forgetting a few things since it's so late right now...:-P