The chassis looks like part of it was taken off of nanoxia's itx chassis and rosewill/Jonsbo mitx layout cases.
vertically mounted matx cases would be the most space efficient as they build upwards and watercooling support is plenty - example 350D which is also cheaper than the Aerocool case.
Nice find Niels, although I'm very eager to see Rosewill's Neutron chassis that was apparently prototype'd/showcased at CES last year.