Rule #1- Do not use dyed coolant. It will gunk up the system.
I believe in the best when it comes to water cooling (Waco). Thermalchill makes one of the best radiators. I would suggest the TA120.3 or TA120.4.
For pump get the Liang MCP655
Waterblock Apogee HD
Res... many choices. If you want small, the Swiftech Micro Res is good.
Tubing: I like Tygon the best
Danger Den V2 waterblock for the 6950's are good and reasonable:
Apogee HD pretty much is one of the best waterblocks...