This is a case for Cubieboard.
Cubieboard is an Allwinner A10 development board, 1ghz Cortex A8, 1GB ram, SATA2 port
For added flexibility, push the cubieboard into the top when its just printed and still cooling on the bed. This will guarantee the most excellent fit :)
I used JohK's metric library, but as I couldn't get the mountingholes right, I just removed the mounting ... It's commented in the scad if you want to take a swing at it.