So I lied when I said I can't put the pump and everything inside the Cerberus if I want to have my 3.5" HDD. More like my inexperience... After switching to Alphacool elbows instead of using the hardware store copper elbows, I can squeeze everything in with some breathing room. I'm using the 280GTS radiator for the case and I wouldn't recommend it at this size. The radiator can fit at the bottom, but the pins can't go in fully.