I think at 30L the mini tank is the biggest mITX case you can get. its the same size (volume) as some good mATX cases like the v354 and TJ08-e which will give you better overclocking support and more sata ports.
nice rig with lovely hardware. Gonna build me an htpc/lan rig with same case or the fortress 3. Do you think that case would fit a Noctua NH-U12P SE2 cooler?