Great company, but Iwent Koolance 601 case last year (april 2003) and recently ordered Koolance 650 series case. I don't mind of Koolance running the smaller diameter tubing. My first machine stays a constant 30-32 degrees celsuis, overclocking a P4-2.8C to 3.5Ghz. I haven't really tried to go any higher by adjusting voltages, memory sticks,etc. Its on a Abit IS7 motherboard,
The newest case the 650, I haven't put that together yet, I have a Prescott P4-2.8E cpu, Abit IC7-G max2, Corsair twin LL DDR3200 memory.
Maybe be ready in a week or so.
Have fun water-cooling.