I have owned several Western Digital hard drives, in fact it is the only drive I have owned as of yet. From 1.6GB to 40GB, I have never had any problems. They are fairly quiet and can keep up with the other 7200RPM drives.
I got the ATA100/7200RPM drive for $180 or so, and no CD-Rs, so this is a good deal.
Of course hard drive preferences vary. There are always some problems with any brand, but from my experience they have been reliable.