hey, i need some information on building an external harddrive. I was looking at HDs on newegg and noticed a huge price difference between 7200 RPM and 10,000 RPM. Do i really need an 10,000RPM drive? i'm just going to be using it to backup my information and store music, pictures, videos, and other shit. Oh, right now I only have USB1 or I can use my firewire PD card. This will be for a laptop. also, do you know a good place to get a case? thanks in advance.