It's a Tyan barebones 1U server, you'll have to get whatever model they've got out now since my model I'm sure has been superceded by something else.
I plugged the aforementioned processors and RAM into it, two 500GB SATA hard disks in the front and attached them to a 3ware 8006-2LP. The Tyan barebones system comes with heatsinks for the CPUs so you don't need much else.
I wouldn't mind a little bit faster I/O, if I were doing it over again I might do four disks in RAID10 instead of two disks in a mirror.