I haven't had any problems with Seagate, and my brother hasn't had problems with Western Digital, so just go with what you think is better. At this point there's not much difference between them.
Originally Posted by the_beast
Get a Samsung F3. They are slightly faster than the Seagate .12s, and much cheaper. The random access is slightly lower than the 640GB Black drives, but the 1TB F3 costs the same as the 640GB Black. Once short stroked to 640GB, the F3 is faster overall. It is therefore the better drive in all respects.