Looking for:

dual CPU
quad core opteron processors
support for 16 GB RAM
no onboard video
unregistered RAM
ATX board
Overclock ability (going to water cool it)

Any ideas?

I'm planning to use this as my VM server and may run some games under VM sessions on it so it needs to have good video support. This is only for dual (and triple) boxing and not my primary system. I currently have a single CPU Opteron system running XP64bit with 8 GB of RAM but want to upgrade to support more VM servers (I'm a server admin) and better gaming ability.