GTAIV does warrant a quad and Metro 2033 is a GPU devourer so @ $563AR we have
GPU devourer @ 1440 X 900? Seriously?
@Ramiraf - The 460 is a much more powerful card & you should get it if you can afford it. But the truth is, that @ your resolution, you wont need anything more than a 5770. Actually, even a 4850 might not be terrible if you don't insist on playing everything on high. It's just that, I haven't met too many people, who buy a 460/470 at a $500 build budget.