Children, children, XP 64 is a great program even though very few people use it and drivers are scarce.
The vast majority of users are 32 bit based because of the driver issue. I tried XP 64 and had to drop it because of driver issues.
Many components (re: printer, scanner etc.) drivers are not supported in a true 64 bit version, Vista and Win 7 are.
Windows 7 32/64 bit versions have had the multicore scheduler re-written and optimized, it will work better than XP 32/64 with multicore CPU's, this was also partially true with Vista.
The memory management in Win 7 64 bit is better than XP 64. Microsoft has been through a learning process over the last few years (Vista being the exception).
Win 7 now only loads components that are required for the OS to operate with other DLL's etc. loading when requested, drivers load in parallel, something XP 64 does not do.
Win 7 32/64 will have far more drivers within 6 months than XP 64 will ever have.
I realize you have your views as well as others on this Forum and I/we respect them. I agree that XP 32/64 will remain for many years to come as will Windows 2000 and 98SE.
Still have clients running Windows 3.11. Some claim that is the best OS, others claim 98SE is the best thing since sliced bread, all personal viewpoints.
Many people on the Forum who have testing knowledge of Win 7 believe it has the basis of a great OS possibly as great as XP.
Go in peace children and fight no more.
Enjoy your weekend.
Stu