I'm running a rack mounted Pentium 4 - 2.4 gHz with 1 gig of RAM and 2x80 gig hard drives (one OS, one audio) on Windows 2000. I use an Echo Layla 24 interface with Sonar 2.0. I monitor through Quested F11P's powered with a Crown K2. It works great. It was easy to setup, and didn't cost very much. Hope this helps.