Don't order a kit. Build one yourself.
Go to www.dangerden.com
Get a TDX CPU Block
D4 MCP650 Pump
Couple MAZE4 GPU blocks for your sli setup, just get some tweakmonster RAMsinks for the RAM on the card.
You'll also need a reservoir, or you could make a T-Line...it's exactly what it sounds like. Tube splits off into a T, the line goes straight up (gravity of course making the water go down) and that T-line acts as a small reservoir.
At xtremesystems.org theres a guy named "Weapon" PM him and he can make you a modded 302 77 bonneville heatercore with shroud to accomidate two 120MM fans. Everyone is please with his work and for good reason.
Should be basically everything you'd need.