I wish they would make water cooling as an option soon. They get pretty hot and makes a small room very warm specially when I am folding.
Regardless of the heat exchanger technology (air vs water), the same number of BTU's have to get transferred out of the chassis. All liquid cooling would do is raise the cost and lower the reliability (remember the liquid cooled G5 leaks?).
Seriously? you have any benchmarks? I always thought water cooling was superior to fans/air.
Having used water cooling on previous PC's I've owned, I would never go that route again. While it's great for enabling max overclocks, it can be a total pain in the ass (evaporation/filling, bleeding, leaks, servicing, etc.) to maintain and has no place in a computer designed for everyday work (IMHO).