And here are some more examples: http://sys.us.shuttle.com/ http://www.truespec.com/computersystems/daudio/shuttle/index.shtml http://www.bsicomputer.com/

The liquid cooled PCs are whisper quiet.

One of our large music stores have had one running with Windows XP for over a year without failures/restarts, etc. Reliability simply is not an issue if you invest the time and money to do the installation and required tweaking.
http://www.videoguys.com/WinXP.html http://www.musicxp.net/