Looks like Hexus.net is having a little phase change action with the Vapochill XE unit.
If you want to supercool a processor this is where the action is best.
While it's hard to come to concrete conclusions about cooling hardware, given the variables involved, I can say this: 180W of performance is enough to run an Athlon XP 'Barton' at 2.7GHz load with only 2C reported diode temperature, in a hot room.
Check out the rest of the action
Here