Well, I need a new hard drive for my 3 something year old MacBook Pro. I am thinking about getting Mac OS X Snow Leopard from Apple Developer Connection.
I would rather get the 320GB 7200RPM hard drive instead of the 500GB 7200RPM because of the price difference.
UPDATE:
This is the hard drive that I bought from Amazon.com
Western Digital Scorpio Black 320 GB Bulk/OEM Hard Drive 2.5 Inch, 16 MB Cache, 7200 RPM SATA II WD3200BEKT
instead of