For the last few years, Samsung drives have been very fast, and very quiet.
Now WD has some "green" offerings that are very quiet, but a little more slow. They spin at a lower RPM but have more onboard cache.
I don't think that you can buy a bad hard drive right now, they are very much a commodity unless you are buying based on a certain drive for performance applications.
I have experience with returning Maxtor and Western Digital drives that were defective, both companies are very good about replacing the drive with a refurbished unit promptly.