I see some awesome benches for the >400GB harddrives, like the Hitachi Deskstar 7K500, Western Digital Caviar SE16 WD4000KD, and the Seagate Barracuda 7200.9 500GB. But are these companies making one platter versions of these monsters, or is that sata2, 16mb cache, massive areal density goodness staying in the $300 dollar range for a while?