Intel is generally considered faster for a single
processor
workstation these days, but unless your planning to do a lot of very
CPU intensive stuff (silly amounts of plugins or softsynths) It really
shouldn't matter.
In my opinion stability / quiteness (power consumption) is more
important than CPU power. If you need 3d graphics then AMD do have
some nice low power solutions, otherwise go with whatever is easiest
for you.
My list would be
1) A case with good sonic insulation. (the last one I bought for an
audio workstation was an Antec something 180)
2) A high quality power supply with as large a fan as possible (larger
fans make less noise).
3) Possibly a 3rd party CPU heat sink/fan combo design with quiteness
in mind.
4) Look for a board with esata - It's very handy :)
A lot of parts are rated for their noisyness at
http://www.silentpcreview.com/ last time I built a workstation I
cross referenced their reccomended parts with what my hardware people
had until I found a match.
Of course if you have your machine built into another room etc you
won't need to worry so much about sound.
(Not related to Firewire, but to noise avoidance)
We have recently built som machines at NOTAM that produce very little noise:
.
/ Hans
--
Hans Wilmers
NOTAM
Nedre Gate 5
N-0551 Oslo Norway
tlf.: +47 22358065