My Cubase VST32 works quite well with my new Quad Core 3.2 Ghz and 4 Gig of Ram, thanks very much. Can't complain about performance or noise at 2 ms latency, either. I wouldn't mind running XP for another 10 years, if only there was an SP4...
What else am I running that crunches performance - SQL Server (2 instances), Windowblinds, ZoneAlarm and a 1680 pixel desktop with full effects enabled. These would probably weigh in at about 1% of my CPUs if I switched them off.
And I have no problem using my DAW online, as it is also my work machine. Have not had to reinstall windows in 6 years since a lightning killed my previous rig. The only thing that is coming and going are new MOBOs, CPUs, Graphics Cards and the occasional bigger hard drives. And I wouldn't like to swap my nice retail XP Pro with any drm enabled Windows7 - I wouldn't even know which version to get.