Hi,
I've had fewer issues with 64 bit than with 32 (x86). The biggest problem
most people find is supporting drivers for add-on peripherals, not all
vendors are supplying them or even working on creating them. Also keep in
mind that you cannot run legacy 16 bit software, so if you have a favorite
old program from the DOS days you are not going to be able to port it to
x64. Otherwise, x64 is nice and quick, just be picky about the hardware you
choose for the system. It has no problem running any 32 bit software I've
thrown at it (even some not so nice programs, don't ask why).
--
Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP
Windows help -
www.rickrogers.org