Hi all, i've got one old macbook pro (bought it new at the start of 2008), 15inch jobbie. I use it at the moment for everything; web browsing, downloading hideous amounts of music (for dj use), music production (ableton etc) and also djing off (native instruments traktor pro). It's just not cutting it, the poor old thing is noticably slow when it comes to running traktor, i have to have the latency on the soundcard really high and run everything on the lowest quality imaginable. This still effects the sound quality, even though i've optimised it as much as possible. So i'm getting a new macbook pro 15.4 i7. But i will be using it only for Ableton and also for djing with (Traktor). I want to wipe pretty much everything else off it, it's just not going to be needed. But i'm worried there's something important that i will wipe off it. What is a big no-no to delete? Any help is much appreciated! tim.