If you could you could get 2 280 radiators in this case it would be all you would need, one at the front and one up top, they are very close area wise to a 360 radiator. Depth (thickness) is not a big factor, frontal area is, the 280s are a great improvement over a 240.
2 of them give a lot of cooling, but a good pump is needed for 3 blocks, something with around 1.5 gpm is nice, no bleading problems that way..