I wasn't happy with the western digital hdd I used in a build, as the part on the back was very wobberly, and I felt like I was going to break it when taking out the power cable. The welding round the middle was poorly done as well (looked like it had been grinded off and re done. But, it is quieter than the seagate hdd, but that could of been due to the case was a silent one.
I will stick with seagate hdd's.
RMA service for Seagate is very quick too. I got a replacement one in 5 working days (I sent it to a courier service, who sends it to them in another country who send it back to you. They sent the replacement the same day they recieved my drive.)
Edit: It was my fault that I had to send the drive back, as I put it in a PC with a cheap PSU, which sadly sent a surge, and the drive caught on fire (briefly.)
Cisco CCNA, Comptia A+, 1/3 through CCNP