Again, thanks for the info

I never tried a 64 bit system even though I had 64bit CPUs for years now. Not sure why. I mostly worried about driver support (in the beginning), and later the absence of 64bit versions of software which I used so I failed to see the benefit (running mostly 32bit software on a 64bit OS).

I currently have a dual boot XP and 7 on my development desktop but both are 32 bit.