Western Digital 500GB 3.5", SATA, 16MB Cache Bulk/OEM Hard Drive WD5000AAKS

A great replacement hard drive! However, you will need a free SATA power connector(there is no legacy connector).

It works very well, and was my first SATA install. The only problem I had was that my motherboard's SATA controller is a couple of years older, and did not support the high data rate of this drive. A jumper was required to configure the drive for the controller, but as this was an OEM package, it didn't come with one. I use Debian Linux with a packaged kernel, and found no problems at all between this drive and the OS.