I'm already running Ultimate 64 - I have a technet account so I get all this stuff in my subscription. Let me say this to all of you that are weary of Vista; I was too, the betas were utter dung IMO. While the OS looks the same as RC2 (for the most part) it works LEAPS and bounds better, it is like a different OS altogether. I was mortified at the betas, after messing with them for 2 hours they got uninstalled. 64 bit is the way to go IMO, it is much more secure for starters. Driver support so far (at least for me) has been the same as with x86. Note though, have at least 2GB of ram as it will help performance. What some people do not understand about Vista is that it uses ram much differently than and previous MS OS. It caches a LOT so it appears all memory is being used, this is not the case. As memory is needed for programs or whatever, the cache releases memory on demand. I have to say that Vista IMO is much speedier than XP.