I have the Maxtor 740x, and can't say enough about it
It's fast and quiet. I think I got around 620 on my last PCMark, and I sleep with this thing on, I hate noise, and I can tolerate this drive even when it is transfering massive ammounts of data around... As far as CPU usage, I don't notice it, but I've heard rumor...
I've been a maxtor man for a long time (ever since the 386 days...), although I did take a short detour to Quantum, which has been absorbed into maxtor anyway
Let's see, I have a Maxtor 80 Meg, 360 Meg, 2.1 Gig, 8.4 Gigs, 40 Gig, and of cource, 8 0 Gig.
I also have 2 9.1 Gigs, and 18.2 Gig Quantum Drives

I could start a store, or a museum
I have multiple other segate (I think a 2 gig, and a 1 gig), western digital (ohh, they're going to BURN), and minor other drives, of no conciquence. Hmm, how about a window mod??