well, save for gaming, I prefer not to use either of them. 32 bit I would take 2k over everything. 64 bit, I have to say vista. I am actually getting pretty accustomed to it again. Learning all the little do dads it has, like windows mail and the calendar. I know 7 is better optimized, but it goes back to like the video card. Its all I need, and will do the same thing, so why use the extra, plus it is stable while the digital download of 7 I have is corrupted somehow.
XP would be okay as a option against 2k. Thats whats on the M90, mainly because its 2k video drivers were not stable. I may go in and edit some things and try it again. Ill try that after getting all my computer all tidied up and work on some cables.