I have a pair of Maxtor D740L 20GB. I believe there were to version of this HD, ball and fluid, I got the fluid version thus the L code. I've been using them for almost 2 years now. They've been fast, reliable, and most importantly to me, very very quiet.
There are two 120GB versions w/ that price tag, 6Y120L0 and 6Y120P0 (OEM models). Both are DiamondMax Plus 9 drives, but the latter comes w/ 8MB cache. The retail version of the 8MB cache drive is L01P120, but strangely only comes w/ an 1 year warranty, while it's OEM counter part comes w/ 3.