This will do it
http://www.frozencpu.com/products/14183/ex-wat-182/XSPC_Rasa_750_RX360_Universal_CPU_Triple_Radiator_Water_Cooling_Kit_w_RX360_Radiator.html
great for first time water coolers and for what you want to do, but of course add two gpu blocks and a couple of extra fittings.
Option 2. 570s have lost their value tremendously, i spent around $740 on 2 of them like a year ago, now they're worth 250 a piece if lucky. From what i've seen 7970s on cfx show a great performance.
1. Read post 19
2. In my case i upgraded from x58 recently to avoid losing too much money on that hardware, didnt care for their warranty since these gen3 motherboards doesnt even have true pcie 3.0 and i needed something for the meanwhile and cheap, now when true ivy bridge motherboards such as...
Go with an asrock extreme 4 gen 3 or extreme7 gen 3 which has the nf200 allowing you to run two slot at x16 and 3 way sli or trifire. I bought the extreme4 and im very satisfied so far.