I'm using the 32bit version of vista, but I'm wondering if I should switch to the 64 bit version. Is there anything better about it?

I've read that it's more difficult to find drivers, but I think my hardware is supported.

x86 typically means anything with the intel architecture like 386, 486, pentium, etc, so it also implies that you are running 32 bit, whether on linux or windows.

As far as the 64bit version goes, I'd avoid it unless you are doing lots of calculations or processing of some type. Even if your drivers are supported, a lot of codecs and other software won't work on 64 bit yet.

Eventually everything will work on the 64bit line, and everybody will move to it. It's not necessarily worth the trouble at this point, however.