Well, fair enough. That old Dell 133 I have is very quiet and is in a mini-tower form factor. Holds two disks easily, 4 if you convert 5.25 bays to 3.5. The old P133s don't have a CPU heatsink, so the noise is coming from the PSU, most likey. If you can find an old machine that is small enough for you, you could always spend $40 or so on a very quiet PSU. Check out silentpc.com for some options.

Just my $.02.

J