Since you asked for advice, I'm gonna give it: I'm sticking with that vote for GT267, even despite your criteria for 17" display. The larger screen size only gets you an additional 2 1/2 square inches, at an extra 1.66" width x 1.51 height. It will offer more portability for when you aren't gaming, and you can just move it closer when you are gaming. If you are sticking to the 17" despite the recommendation of people you asked, then the only regret you'll have with the Gateway laptop is not going for a smaller model, and not getting a better screen.
For your consideration, I have the Gateway P-6831FX, with a 17" screen, 1.66 C2D, 3GB RAM, and an 8800M GTS. I have issue with its weight and size, along with heat (the cooling is DEFINITELY not enough) and the LCD panel's contrast ratio, but everything else is good. I ride a bicycle, and have wiped out while carrying it three times now. One of those times I had to replace the screen, but that was because I was hit by a drunk driver. The keyboard is one of the best I've used, and the track-pad is alright. Also, The multimedia buttons are useless. Absolutely useless.