Is the second PCI slot still in the plan? CeBit model looks like it has one PCI. This case is perfect for new short cards. They are not Radeon yet (at least I dont know) but GeForce from ASUS (just GTX 670 been announced). Most performance cards have double DVI ports, on two PCI slots. There is one from ZOTAC short perfect for these small towers.

The option for bottom mounted fan in place of HDDs is good idea. Even if it would be just slim 15 mm one.

Colour and bay stealth are secondary, but if there was white...