Do what I'm doing - put a rad in the bottom! You'll have to elevate the case a bit and (more than likely) add a filter before the bottom rad, but it will be much better than two top mount rads, let alone a single top mount rad... If you plan on using those smaller rads, even better. You can keep the removable HDD cage and still have room for the lower rad. My setup (nearing completion) is a PC-60 with rad in the bottom (to the front), MCP650 behind it, and [I planned to have] a rad made of acrylic tubes above the pump. The two HDD's were put in the lower 5.25" bays, so a top rad was out of the question.