I'm not really experienced in setting up Bootcamp on Mac, but I have a few Windows games that I want to play; so I'm taking the plunge and installing W7. I am looking at installing: -Bioshock -Bioshock 2 (when me order arrives in mid-feb) -Unreal Tournament 3 -Sims 3 - maybe.... So how much space does W7 really need, I have a genuine W7 Ultimate x64 to install (got 8GB DDR3 on my 27" iMac) so there seems to be no point installing x32... Probably... Seems I need 20GB just for W7 x64... But how much space to leave for the games I want with a little space to grow?