Suggestions on Ubuntu server setup

[Keith Clark]

Any suggestions on how I should install/configure Ubuntu server on the 
following hardware that I'm acquiring tomorrow?

Dual Xeon 2.0 GHz processors
5 x 146 GB SCSI Hot Swap Drives (10 Bays available and maybe filled in 
the near future)
16 GB RAM
1 Gb NIC

This machine will be used for various game servers (minecraft and the 
like) for my Son and his group of friends.  It will also handle 
email/chat/ssh/file sharing as well.

I was thinking that maybe something like Proxmox first and then multiple 
virtual machines under that?  I have zero experience with that but it 
will be fun to experiment.
Thanks!