Well, just got myself an iMac G5 motherboard (1.6GHz model) and am going to attempt a headless iMac G5 system. To begin with I intend on just sticking it in a cheap PC case until I can fabricate one of my own design.

Before I do this, does anyone know if a standard PC power supply will work with the iMac G5 motherboard, or whether it would require an Apple spec PSU? Also, for when I start fabricating my own case, are there any "slimline" PSU's available on the PC market that would do the trick?

Secondly, I know heat will be somewhat of an issue, however I want to make the system as quiet as possible. Do you think just good quality fans and ventilation would do for this or would water cooling be the way to go?