It started as a joke from a friend: why don't you install the radiator,fan & pump in the hallway closet?
As my computer is located next to a wall leading to the hallway, I decided to bite the bullet.
I bought an Inovatek set including 6 meters of water hose, I drilled some holes through the wall, neatly installed the fan, pump etc. etc.
Everything works like a charm... I can have the fan cooling at full blast and I don't hear a thing of it... Prescott, here we come!
The closet is big enough to handle the heat; during the two weeks lasting heatwave in Holland, the CPU temperature reached 48 degrees with only a 10cm hole to allow the heat out.
By the way, Innovatek sells a kind of special plugs which you can install in the waterhose so you can easily disconnect without any water leakage in case you need to service your computer.
A very happy watercooling user,