I'm looking into buying the aforementioned iMac (21.5" 2.8 GHz i7 6770M), and would really like to be able to play Colin McRae: DiRT on it. Anybody know if this would work or not? I'm guessing that W7 64 bit would be the go, and I've seen that the i7 can create issues but it can easily be fixed.. but I'm unsure about the graphics card. Anyone know?