Ok, I'm considering building a new machine and switching to vista when I build it. I won't have an xp license anymore as I'd be selling my machine to my brother. I don't think I can just buy an upgrade version then can I? I'm wondering which I should go with, retail, oem, upgrade and which version of vista. Through my school I can get an oem full version of vista business for a very discounted price, but I don't know for sure if you can install the 64 bit version from this. Also, would a normal user miss features by buying vista business instead of one of the home versions? I checked on microsoft's comparison page and it looked like I'd only miss out on like 3 new vista included games and some new windows media center. I could still install windows media center 11 though I'm assuming if I went with business.