Genuine Windows Vista Ultimate [add $85.00]
Genuine Windows Vista Business 64 [add $25.50]
Genuine Windows Vista Business [add $25.50]
Genuine Windows Vista Home Premium
Genuine Windows Vista Home Basic [subtract $41.65]

which would you go with and why. I have to get vista, so don't give me the xp pro route h: I was looking at the Business 64 since I will be running a 64 bit processor. I just don't know if that is going to provide me with what I need as opposed to just running the 32 bit version of say vista home premium.