I asked about the Komodo Barbs earlier.
Today I found a great deal and got a 7970 in a Swiftech Komodo water block for $250. I spent the whole evening setting it up, I did have to cut some corners but for my first step into real water cooling I think I did well. I'm a little paranoid about leaks, especially since I shaved off layers on the H220 tube to be able to fit it in the barbs that came with my 7970. The temps are really good, my 6950 with a custom cooler usually idled around 40C but the 7970 and i5 3570k both stay just under 30C.
I'll buy an extra radiator and real coolant rather than distilled water some time next month.
The case is an Arc Midi R2, it fits the H220 well but you won't be able to put in all the screws.