I'm in the market for a new MB and I'm thinking about whether to go for a 64 bit board. When I last looked at this (well over a year ago) I think people were saying that since Windows is not a 64 bit o/s there was no advantage to buying a 64 bit mb and cpu. Is that correct? And if that is not correct, what kinds of apps work better with windows XP on a 64 bit mb?