Hi Nancy,
Like Jim, we are on AIX and feel it is a very good environment for production. We have a vendor supported Windows Cloverleaf system in-house and occasionally have problems with it. It does not have that many interfaces – ADT, charges and scheduling – with a live a live and test environment. Windows, in my honest opinion, is not the best platform for a large production environment.
I can not speak for Linux but it has a strong growing fan club in the Cloverleaf world and outside, and might be an option as long as you had a person that would handle the administration (same for AIX) of the server.
Good luck in your reviews and if you have any questions, please let me know.
Chris Brossette
Team Leader/DB & Integration
MS Baptist Health Systems
Jackson, MS
601.968.1396
cbrossette@mbhs.org