Aside from being the best IDE drives on the market, Western Digital's SE line (the ones with 8MB of cache) retain the classic three-year warranty. If one really needs lots of space, one could buy the WD2000JB (200GB drive). I recommend the 80GB - 120GB WD SE drives, as they are now very affordable (due to the release of the 200GB drive family). Also, since the 8M SE drives cost only $20 - $30 more than the standard 2MB cache drives, you are practically getting the extended three-year warranty for free. I have 2 WD1200JBs in my system and I am very satisfied with their performance. While the WD drives are far from noisy, if you have a near-silent system and desire a near-silent work environment, then Seagate's Barracuda IV and V drives are the quietest in the business (I can't even hear my Barracuda IV!!). While the Barracuda V is a tad faster and quieter than its older brother, the Barracuda IV, it is difficult to find right now - it should appear in late November. However, my vote is still the WD SE series, as they mop the floor with the Barracuda drives, and are not much louder.
Drives I Own:
Asus S520/A, Plextor UltraPlex 40TSi, Lite-on XJ-HD166S, Pioneer DVD-106S, Toshiba SD-M1712, Plextor PX-R820Ti, Plextor PX-W1210TS, Plextor Premium, Samsung SM-352B, Teac CD-W540E, Yamaha CRW-F1, Plextor PX-708A, Sony DRU-510A