To be honest, if you change the orientation and mounting of the parts, it almost seems you could fit three 3x120 rads in there. You'd need to have some high static pressure fans but I think it would be possible. If you REALLY wanna kick it up a notch, throw in a small AC for some chilled air action
Oh, and I'd definitely thrown on some quick disconnects for easy transport and switching between systems.
Update: Going to redo the entire setup. Complete teardown and cleaning.
Going to get rid of the acrylic.
The metal base will stay and go upright. I'll use my carpentry skills to make a wooden base/support for it.
Going to mount the PSU (new one) on the back of it as well as mount the fans on the back. The front will very neatly display the radiator, res and pump.
hopefully do it this winter when i'm rdy to upgrade to ivybridge, or SB-E. unless piledriver shows up ready to compete.