What about power consumption?
Think about environment!
Most people have no use of cold computer. I thing WC will not spread among common users quickly. A-64 (for example) do not produce so much heat as A-XP...
Home made watercooling is much cheaper than commercial. It cost me 20$ (pump included)
. Its performance is good (bit better than dd RBX) and I have spent great time developing and manufacturing.
OT: What is the best block? LR Storm G5?