That was my thought too, something like a 570 to be on the safe side I was thinking. But for me, my trusty 5870 seems perfectly adequate so I'll bide my time and won't upgrade unless they release of Crysis 2 style graphics upgrade.
I don't think the graphics were all that mindblowing to be honest. Far from it really but that could partially be down to the map. But with Battlefield graphics was never the most important thing. I'm liking the general map layout - I think it's inspired really. DICE ought to be given credit for that. So far all the attention is on the graphics and the engine and destructibility it seems, which is sad.
The marketing hype creates an expectation graphically, and this is likely down to the movie-esque trailers that were likely cut together by marketing boys who have sod all to do with the game development. As FPS players we all know it's the gameplay mechanics that count. I'd much rather have great gameplay elements than beautiful vistas though I wouldn't complain too much if we had both!
Yeah, overclock that CPU! What did you go for btw?