I wouldn't use IBM or WD right about now.. times change though, I used to love WD.
I'd either buy Seagate, Quantum or Maxtor (Maxtor and Quantum are now pretty much the same)
I have 2 Maxtor D740X-6L's and like the reviews have said, they REALLY ARE silent!! they are fast(!) and very very quiet, I love these drives!
Also, I have built several PC's on the platform of the Maxtor drive, and no problems... Same with the Quantum Fireball plus AS.. great drive. Overall, for the price/performance, you can't argue that the Maxtors are the best.. Great value. 🙂