i'll hav to go wit 4850 GS.
performance is superb & can OC quite well as well.

people who r saying 4870 > gtx260 216 is definitely a fanboy.

hey, i'm using 4870 myself, & i admit dat gtx260 is better in most of the occasion, it vary on games.
but 4k series has its own advantage, one of dem is in AA.
4870 loose a little b coz driver not optimized, i still hold faith in my 4870, hopefully ATI will release a better driver in the future.........

just screw it if u dun plan for multi card setup.
coz b4 x58, crossfire can only b done on intel chipset.