Space is always a great thing to have.
As such I really like the Mountainmod.com cube cases...but sort of gasp and choke at the price.
Some nice alternatives would be the:
Yeong Yang Cube
Chenbro Cube
Codegen Cube
Now the Codegen is admittedly more but comes with an easy installation for a double power supply setup. Kind of nice if running more than one 12v pump for running it off of a secondary PSU. I have heard of some knocks on the Codegen quality but have had one steel Codegen case for over 2 years with no difficulty *shrug*. The thing I really like about the Codegen is the removable plate that the power supply mounts to. Its premade for some modding to fit in a Rad/HC AND gives you a second chance if you decide to change something down the line.
They arent overly sexy cases BUT they have space. With a little modding I think about any one of them could be really amped up in terms of appearance as well.
***EDIT***
Upon looking at that Codegen (which you can get for $170 at Dealsonic.com) it would appear that the drive/PSU side is practically custom made to cut out the stamped grillwork for a dual 120mm rad/HC. The question would be placement of the intake fans. I believe they could be placed at the front of the same side in the drive rack. Lastly the tubing could easily be run through the provided holes. I would look into getting a dual HC with a leads at the top and bottom for ease of running the tubing. I believe it was Giblet who used a Fedco 2-342 single pass heater core that will accept dual 120mm fans.
The more I look at this the better I like it...
BIG warning however....this is NOT a Lan-Party type case. Lugging this monster around will most probably come with the added costs of doctor's bills for your back
By way of a simple fix for working with this case....I would definitely put on casters for ease of moving it to work with it.