Nice! Got to love those simple purchase order procedures

As for the drives, I would go with the WD GP one not the samsung. Both drives are not rated for 24x7 usage (probably only 8hours/day as most desktop drives) however the WD has a BER rate of 1x10^15 whereas the samsung has 1x10^14 that order of magnitude comes in handy the larger the drive.

Also if you are going to think about a MAID setup (powering down drives when not in use) then the 300,000 start/stop cycles of the WD drive is going to be a huge plus over the 50,000 from samsung.

It's been too long since I've been in a 'quiet' room so I can't really comment on the noise levels.