HotHardware.Com posted a review on the Western Digital WD5000KS 500GB SATA HDD hard disk

If we were to play a word association game with a PC enthusiast and said "Western Digital," it's likely his geek reflexes would immediately trigger and force him to reply "Raptor" before he even realized he had spoken. Western Digital makes many more storage products other than just the speed demons known as Raptors, though. While it is easy to be enamored with the Raptors, they are relatively expensive and offer only a fraction of the capacity of the 500GB and 750GB behemoths currently on the market.

Western Digital WD5000KS 500GB SATA HDD Review