quiet computer power supply and cpu fan

Figured I'd ask. Anybody have any recommendations?
Building a living room computer for the parents... needs to be very quiet. (AMD XP2700+)
And my recording studio computer I need something dead silent for. I have to shut the thing down every time we record. (AMD 64 3400+)

Can't ever trust what a vendor claims about their products... need a personal recommendation.

I bought a Tsunami Dream case from newegg.com. I think it's pretty quiet for the number of fans that it has. But, I haven't had many computers to compare it to.

Usually larger fans are quieter I think. Newegg will let you see the noise of each fan in decibles online. They also have excellent reviews. I'd suggest you start there if no one here can help you.