@Arcturus
I bought a 5400RPM 320GB Western Digital hard drive with a 16mb cache and installed it myself within the first week of owning my ps3. Never had any problems with it aside from freezes in Fallout 3. Who doesn't have problems with that game?
Anyways I doubt they still sell the same model they did 5 years ago though. I bought it OEM and I don't remember the serial #. Might be able to check the PS3 system info to find out though.