Western Digital Raptor X 150GB
 

If you're not that keen on the brassy clear cover, Western Digital also offers a non-windowed enterprise version for $50 less. Both drives share the same firmware and hardware.

Western Digital has made some changes to the Raptor that are more than skin deep. They've doubled the capacity of the previous WD740 to a more useable 150GB. The buffer size has also doubled from 8 to 16MB. In place of the single platter, two head setup from the 74GB version, the new Raptor X sports four heads and two platters.