I think some had the game on win7 and its working, so if you plan to upgrade, you can just go ahead. For MS OS, I prefer to have at least sp1 available before I will move to the newer platform.
If you moving to win7, better to upgrade your gpu to the latest ati 5x series, as to take advantages of the dx11 tessellation on some newer games.
Last edited by ACSS; 24/01/10 11:01 AM.