Search for WD600BB
here.
That is the model number for Western Digitals' 60gig 7200rpm ATA100 drive. I have 4 of the 30gigers, and 2 of the 20gigers, and not one of them has given me any problems...And the ones I bought are OEM versions. Best-Buy has them on their shelves, but be prepared to pay about 35% more from there.
Also, be sure you're getting the BB version, because the AB is the 5400rpm.
Also, I have 2 IBM 30gig 75GXP's in one of my servers, and one of them took a major sh*t on me last year, taking out my 60gig Raid 0 array in the process. I only lost about 1700 mp3's, and thousands of .jpeg's...So no big deal

I will say, the IBM drives run alot cooler than the WD's...Alot cooler! So if heat is a big concern to you, you might want to look at IBM's 60GXP series, which I have read is doing much better than their previous 75GXP series.
Good luck...