I think you would have good luck with the aluminum enclosures from Other World Computing (http://macsales.com). They specialize in Macs, but their external drives will work with any computer, and you can spec out the HD inside the case (call them if you need a specific drive that is not listed).
I would choose a Seagate drive for the least drive noise. In my experience they are much quieter than those offered from other manufacturers. I know they sometimes get a bad rep, but all consumer level drives fail on occasion, and this is not unique to Seagate.
I would choose a Seagate drive for the least drive noise. In my experience they are much quieter than those offered from other manufacturers. I know they sometimes get a bad rep, but all consumer level drives fail on occasion, and this is not unique to Seagate.