I'm using a GTX 670 at present, albeit at slightly better than 680 clocks. 2560x1440 doesn't represent much of a challenge for BF3, Metro 2033 etc. Haven't found a game yet that I've needed to downscale for at a reasonable level of image quality.I don't think that 2560 x 1440 is the way to go for you. You won't find very many decent 2560 x 1440 monitors under $500 dollars. Also, the GTX 670 doesn't like high resolutions