I am looking for a 2TB internal hard drive (setup in raid) that will be used for streaming music and HD movies to a Western Digital Media Player (most likely). So far I am looking at WD Caviar Green which performs between 5400 to 7200 RPM and Seagate Barracuda which is rated at 7200RPM. There is also a Hitachi Deskstar which only has 32 mb cache, compared to 64mb in the other drives. Finally there is the WD Caviar Black which is nearly twice as much as the rest.
I am not sure which drive would be best for its intended purpose though? Should I be comparing sequential read speeds?