I have used Cs3 before in a media arts class, on a mac not a PC like I have at home, and it was simply amazing. I discovered recently that I can get Cs4 Extended for only $299 because I'm a student, but I'm sure I could find Cs3 cheaper on ebay or something. Anyway, my question is, is Cs4 that much better than Cs3? What differences does it have? I'm leaning towards Cs4 because I can get it very cheaply directly through Adobe. Also, is the mac version any different than the PC besides simple controlls?