Re: migrating to apple G4 vs pentium M
well, about 90% of software, programs, etc. is all made to run on windows, so you'll have some issues with compabtility. Very fews will run, although I did see some mac games, like games made especially for mac out in some store. Controls are different, like ctrl + a isn't the same thing on a mac, etc. Different interface will be there. Pretty secure though, and excellent os, the os x. As long as you aren't an extreme gamer, you shouldn't have a problem changing...
Macbook Pro and Logitech z5500s. All you really need.