Simplest solution: quiet power supply, big finned
heatsink/fan combo
(see above) or heat pipe wotsit (didn't have the nerve to try that
myself), quiet HD cooling enclosure (extra fans, but can actually
quieten your HD).
if you dont want a big ugly case and a half dozen tweaker mods to install, you could check
out a Shuttle. it just has a gigantic headsink/heatpipe/fan/heatgrille combo. all you do
is wipe some thermal grease on top of the CPU and screw it on. the fan is so big that it
spins slow and you dont really hear it. mine never come out of low anyways.
best to get a HD that doesnt make any noise in the first place. like a Samsung..
although you may not care, SC, Chuck and SuperCollider don't work on 64bit OS's.
certainly that should be a bigger concern (to people on this list) than qdxproprietary
whatsit browser codecs..