Need help loking for a cheap video card.

I need help looking for a video card for my computer. I am buying a new computer, and it is going to have windows vista, 4 gigs of memory, and a dual core proccessor. I really want to computer I can play crysis on. I am looking at maybe the Geforce 9600 or the Radeon 4850. Are any of these cards good enough to play crysis with it looking very good and not a lot of frame rate problems? If you have any syggestions that would be great. I just need help thanks.

Well i have a radeon 4850 and it beats the nvidia 8800GT but its overclocking ability is kinda fail and it idle temps r very high (i get around 80 degrees celcius on idle). I think u can play crysis on max with 1280 X 1020 resolution w/o AA with the 4850 on a framerate of 40 or so. the nvidia 9600gt is worse than the 8800GT by quite a margin i think. U can prob only get 25 - 30 fps on crysis with a 9600GT. i think the radeon 4850 is almost the same as a 9800GTX but the margin isnt that great so price wise its better to get a 4850 than a 9800GTX.