Is this going into some kind of case? If so, a cheaper ATX power supply should do the trick. I would suggest this
Seasonic 350W 80+ Gold PSU.
It should make that much noise. However, if you want something smaller, you might want to look at an SFX PSU. They are about 1/3 the size of a standard ATX PSU. I have one from Silverstone (ST45SF) and there is a Gold version of that PSU as well (ST45SF-G).
You would have to make the SATA to USB adapters yourself (the only thing I know of is eSATA to SATA power) which just seems ridiculous.
Of course, your "ideal" would be pretty easy to do. Get a few of
these, a few of
these, and as many of
these as you need. That should do what you want.