After years of use, I think that my PowerBook finally died on me. Although I hope that it can be fixed, I wouldn't mind purchasing a new Mac. I am pretty sure that I'll need a PowerBook, either a 12" or a 15", whenever that may be. Price is not a problem. What would you reccommend? I would use the computer daily at school: Photoshop, iMovie, iDVD, Keynote, Word, Excel, Internet, Mail...