Hi. I've been wanting to get a water cooling kit, but every kit i see has one CPU, one VGA, and a northbridge water block. I'm already using a Noctua NHU-12 CPU cooloer with two 130mm fans keeping it cool. I want a water cooling kit to cool my two 7800GTs SLi and northbridge chipset instead of my CPU. What all do i need to buy to just build my own water cooling system? I'll need two VGA and a northbridge water block, duh, but what else to just get a basic water cooling setup? Water pump, reserve, and tubing definatly, on top of the blocks. Anything I'm missing? I assume its cheaper to buy the individual parts for what i need vs. "kits" who's quality I'm skeptical about. Thanks!