As Aristides said, you need a 64-bit OS. If you have a
close look at the web site, you will see that they DO have drivers for both Vista 64-bit and XP 64-bit, take your pick.
By day I am a software developer. My laptop is 64-bit Vista and I never have any driver issues. Well this is not 100% true, a 4-year-old blue tooth usb dongle did not have drivers for the laptop, but it was 4 years old.
Personally, if I where you, and I am sort of because, I too, am building my first editing system, I would not install XP on a new machine, the OS is 6 years old! Vista w/ SP1 is a wonderful OS, far better then XP in many regards and simply far more modern.
Go with 64-bit Vista and you will be a happy person!
Sam
