I considered using this for some extra room on the bottom of the case.

http://www.coolerguys.com/llpe01.html Looks like it might be about 2-3in long.

I think you could mount the rad vertical just behind the drive bay cage. It would clear the factory fan controller, and you could conceal your hdd in front of the rad with fans pulling air from the front of the case. I am not sure if that is confusing.