what gfx card would be best suited for this game?

[TT_uJeed420]

hi acony team i got new system last christmas fx six-core 3.3ghz --8gb ram--hd radeon 6670 straight away when playing hedone i noticed the card struggling frames per second ect' well today im ordering a new gfx card i got radeon 6850 in my sights or one of similar price but what im looking for is an indication of what card is best suited for this game cause after looking around ive noticed diff cards suit diff games like, just cause 2 better suits ati cards some games suit nividea cards better and so on. any indication would help as theres not much info about the specs of this game as yet..cheers looking forward to open beta start date..

[Joadergame]

I got a ATi HD 4850 and it runs smoothly. But in CB2 there were some rpoblems with very highest graphic settings which werent gfx related.
I hope it got fixed for OB