You have a lot invested in your computer so a top quality system will serve you well and last for quite a while. Looking at the "Gallery" will give you ideas of radiator placement and tube routing. The larger the rad, two or three 120mm fan models will give you better performance but will also require more planning for their placement. Here is my recommendation for pieces parts:
1) MP-05 SP LE CPU Waterblock
http://www.dtekcustoms.com/index.asp...ROD&ProdID=154
2) MP-1 GPU Water Block
http://www.dtekcustoms.com/index.asp...ROD&ProdID=157
or
The Danger Den Acetal MAZE4 GPU
http://www.dangerdenstore.com/produc...&cat=18&page=1
3) AquaXtreme 50Z-DC12 Mag Drive Inline 12V Pump
http://www.dtekcustoms.com/index.asp...ROD&ProdID=138
or
DTC- D5 12v Pump
http://www.dtekcustoms.com/index.asp...ROD&ProdID=172
4) Swiftech MCR320-QP-K Triple 120mm Radiator (w/(3) Yate Loon fans in a "pull" configuration.
http://www.petrastechshop.com/12yalod1cafa.html
http://www.jab-tech.com/Swiftech-MCR...r-pr-3320.html
or the high end "ThermoChill" radiator.
Thermochill PA120.3
http://www.jab-tech.com/Thermochill-...3-pr-3264.html
5) 7/16" MasterKlear tubing with plastic hose clamps
http://www.petrastechshop.com/7id5odmagepu.html
6) Delrin T-Line
http://www.petrastechshop.com/madeficap.html
97% Distilled water, 2% antifreeze and 4-5 drops of Povidone Iodine (for biological protection)
http://www.walgreens.com/store/produ...&id=prod385321
The more research that you do the more all of this will make sense and then you will be able to make informed decisions on the correct path for you. Just remember that if you skimp on the quality now you will pay for it later, better to save up and do it right the first time. JMO