Buy the biggest hard drive you can get. Between music, photos and videos, storage space goes quickly.
Thanks for the info! I think I will go with the 500 gig HD M.C.
If it's at all possible to budget for it, get another 500GB external drive (Firewire preferred, but USB is okay) right now. 500GB is a very sweet spot for drives right now, and this won't cost you that much. Now that you're going to go and bring in 100 cds, back that stuff up!