I'm running Vista with SP 1 for it on my computer, I would still be on XP pro but I built my new machine I was having issues with the memory so I had to upgrade to a 64 bit OS, Vista seemed like the natural choice.

When I first got it I was cursing the day I had given over my bank card number to pay for it but have worked out how to use it and am now pretty pleased with how it runs.

The only thing that has bugged the crap out of me is that M-Audio isn't making a 64 bit drver for my MIDI control keyboard, hmph!