i got this on steam a few weeks ago, and i love it. it got some great looking areas, and the gameplay is fun as all hell. but there are a few design choices that drag the game down. and the pc port, while it runs nice, is a classic capcom port. theres no surround sound (the game uses openAL too, so they can't use vista as a scapegoat.) the game always shows 360 controls, and you can't use any other pc controller, the game states on the box it uses DirectX 10, but it doesn't, and the best part about the game (to me) the netplay is horribly broken. its one to check out if you have a 360 or ps3, but the pc version is horribly gimped.
also, an 8800gt should be fine. my 9600gt, not overclocked, can run it without a hitch at 1920x1080,
****ty thing is, grin closed their doors recently, so there wont be a patch to fix the problems. sad, cause when you get it to work, and nobody is cheating using autofire, the multiplayer is insane. think quake 3 with a bionic arm. its also fun just to make a game with friends and just screw around. like this video will show