Answer for Aidoscuz
Image quality is fine using lower resolutions (assuming you dont go mad and opt for 640 by 480 or something ludicrous.
One thing to note if you use a DVI cable if you leave it to the monitor all it will do is expand the image to fill the screen (which actually isn't too bad if you're in wides screen ration - would be wierd if you're in 4:3 though) if you want to use 1:1 mapping or proportional fill you need to do it via your graphics card not the monitor. However, I see you've got a 7900GTX - I'm using a 7900GTO and it looks fine to me when viewed either way.
I vary which I choose from game to game (although I can play most in 1920 tbh).
Your mileage may vary but I wouldn't worry about it (can't comment on it's picture quality compared to your Ilyama but it's a big improvement over my old Dell 21 inch crt).
DinAlt