I am currently using an iBook g4 that i got new 2.5 years ago. For high school graduation i can get a MBP pretty nicely equipped (my budget is 3 grand). I could spend a lot less and get a MB, but i don't know how much better off i'd be with that over my ibook. Should i get an imac instead of a MBP? has anyone tried using a 17" MBP as a portable (traveling, using it on your lap)? If i get the MBP will i end up never using my ibook?