I thought the crossflow fan was a gimmic. Anyway, what CM needs are two 120mm fans over a radiator mounted to the top of the case. A WC Stacker if you will with built in fan controllers. Including 1/2,3/8, and 1/4 fittings. Overlook the second psu for this case as your market becomes the advanced watercooler who wants a quiet case with high performance. IMO.
I would prefer having a radiator in that situation mounted on the bottom as so:
Edit: Also to contribute to this thread:
I would prefer having the metal grid thing at the bottom mounted on the outside (not the inside). When I installed my radiator in the bottom I removed the mesh and didn't install it back on.