I am currently using a 13" Black Macbook MacBook3,1 Intel Core 2 Duo 2.2 GHz 6GB OWC RAM and 150GB HD, running OS X 10.5.8. After my recent RAM upgrade I am looking to do a 500GB 7200RPM HDD and Snow Leopard upgrade. This will be my first attempt at a HDD upgrade not sure what device to buy Seagate, Hatachi, WD. I was planning on backing up iTunes, Pictures, Word Documents and some other stuff to an external and then doing a clean install of Snow Leopard then transferring back the saved documents from my external. Any help or suggestions would be great!