I'm not sure if you still need an answer as this is pretty old, but a pretty good introduction to water cooling can be found at tom's hardware here.
http://www.tomshardware.com/reviews/a-b ... ,1573.htmlThere's also supposedly a new wave of coolers coming out that are going to use liquid metal. Supposedly they're better than liquid cooling and not nearly as complicated. They're still very new however.
http://www.danamics.com/danamics-lm10.aspxGreat system btw. I've got a Q6700, best part is I've had it about 9 months and paid $250 for it and a copy of windows vista (that I sold for 100). It also came with a motherboard, but it was really bad so it's sitting in a closet.