I just bought a 17" powerbook, after using PC's forever. As far as Graphic Design and Video editing software goes, I'm all set. For editing multi-track audio, I've been using ACID Pro on my PC, and unfortunately, Sonic Foundery doesn't make this app for the MAC---bummer!!! Besides an expensive program like ProTools, does anyone have any suggestions of OS X multi-track audio programs?? All I really want is a program that lets me lay down multiple tracks, and I really don't want to have to use Final Cut Pro for my musical productions. Doesn anyone have something that I can download from them, or suggestions of where I can download it. I miss the ease of free downloading on my PC---besides that, I'm totally stoked with my powerbook.