what is a good macintosh defrag program? I was at the Apple store today and was going to up my PowerBook from 1.5 ghz to 2.0 ghz. Said it'd cost me $300! So I just said screw it. Is it worth going from 1.5 ghz to 2.0 ghz? Also, are there any cheaper ways of upgrading if I wanted too? Also, what is a good defrag program for Macintosh? Thanks!