I would invest in a Radeon 4850 if you want to play Crysis, 9800GT will struggle on Crysis maxed out but is adequate. Better yet, the Radeon 4870. If it has to be NVIDIA, I would suggest you shell out the money for a GTX260, I heard those offer pretty good value. AFAIK 9800GX2 is being discontinued, so you don't want to get that because it's going to lack support, and AFAIK 9800GTX+ offers poor value when compared to the 4850 though the prices have come down a fair bit since I last updated myself on this stuff. 4850 and 9800GTX+ are about equal performers, so you'll want the cheaper if you decide to go for wither of these. If budget doesn't allow for a better card, 9800GT is good but if I were you I'd save and go for 8800GT because they're practically the same card (thenagain I'm a cheapskate).