I've been using a windows machine for a bit and now I'm back to my Mac. I enjoy FPS games and since i'm switching back to my iMac, I'm not sure it'll have much horsepower for some gaming. If I were to upgrade from my iMac 2.8 w/ATI RadionHD 2600 to a newer 2009 imac with Nvidia 130 or the ATI 4850 would I notice a big increase in frame rates on games. I would be using bootcamp and playing in Windows btw. I'm not sure it's worth the upgrade price, but perhaps I'm not seeing it correctly. Thanks for any help!