I though I read somewhere that Apple was using either Seagate or Western Digital hard drives in the new iMac. According to my system profiler, mine (27" 2.93 i7 w/ 8GN (2x4), 2TB+256SSD) is a Hitachi Model #HDS722020ALA330. All I know is that it is really quite, never hear it at all. Just curious what others are finding in theirs. Take care!