[ben333]

Why do you NEED a water cooled PSU? There are some very quiet PSUs out there, some fanless. You should be able to passivly cool the whole rig with a large tank of water, a large radaitor or a few smaller radaitors. If you don't want to go to water and don't want to overclock then scythe makes a very large heatsink called the orochi that can passivly cool pretty well. I recomend using fans quieter (or undervolted) than your hard drive or pump - this way you get to benefit from the airflow and still end up with minimal noise.