$569 is what I saw at Austin Homebrew 2 weeks ago when I was in the store and I heard rumours that the prices are likely to go up.
IMHO, don't get hung up on the tri-clamps. If you look closely at the design the tri-clamps are on the out-flow side of the valves which means you still have to worry about all the parts of the 3-piece valve being clean and sanitary.
runhard, trainhard, raceEZ
keg 1-Graham Sander's Tropical Flower Wit
keg 2-Yooper's Fat Sam - I highly recommend it
keg 3-Yooper's Fat Tire
keg 4-XXX Stout
Fermenter #1-Graham Sander's Tropical Flower Wit