Thanks for the input everyone!

And yeah I'm not gonna put the gpus on water.

Swiftech MCR320-QP Quiet Power radiator any good? http://www.newegg.com/Product/Produc...82E16835108098

I suppose I could buy a "thicker" rad to mount up top, something like this http://www.ekwaterblocks.com/shop/ra...ad-xt-360.html
but would I still have room for 6 fans on my rad and be able to reach the cpu/mosfet input?