15" powerbook g4 (1Ghz, no bluetooth) upgrade?

[sarahsushi]

I'm trying to figure out which hard drive I need-- mine is making a good deal of sound, and I'm worried that I need to go ahead and replace it before I lose my data.

http://eshop.macsales.com/item/Hitachi/0A25022/

http://store.mcetech.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=MTOS&Product_Code=MS60G72K&Category_Code=STORLTHDINT

:) Help, please, my mac-conscious friends?