New to Watercooling, looking for input/suggestions

Hi there,
I'm looking to potentially watercool my PC, since its running a little bit too hot for my tastes. Current Idle temps are ~50 Degrees Celsius, with the GPU coming in at ~79 Degrees Celsius. I currently have a Corsair H50 Cooler on the CPU, but nothing besides fans for the GPU.
My rig is setup like this:
Case: Antec 900 II
Motherboard: Gigabyte GA-X58A-UD7
CPU: Intel Core i7-930 2.8GHz
GPU: EVGA 012-P3-1470-AR GeForce GTX470 (x2 in SLi)
RAM: Corsair Dominator DDR3 Triple Channel
PSU: Corsair 1000W

Currently the Antec case is filled with the maximum amount of fans i can fit, one 200MM top exhaust fan, 2 front 120mm Intake fans, 1 rear 120mm intake fan. Any suggestions would be appreciated as i need to get this system to run cooler!
Thanks in advance!

Yea, your hurting for temps, thats idle eh?

Your costs:
CPU block $65
Pump $70
Radiator, a whopping 140x4 radiator, no less or an equvelent two radiators. $130 MIN
GPU block $130
Reas $25
Hose/fittins etc. $60.

Want to continue? A link to a reply, just like your question, pay no attention to the comments, begin on the links. It might take you a week to digest it all, but it's the smart way. Took me three months to learn before I got my first part.........
http://www.overclockers.com/forums/showpost.php?p=6489396&postcount=3
Promised DT temp guide...
http://www.overclockers.com/forums/showthread.php?t=643364