Okay, so I want to get a powerbook or ibook that I can use for audio recording. I'm in a new wave band and I compose a lot. I could get a used 15" G4 867Mhz 512MB powerbook for relatively cheap. Will that be good enough for me to record on? I don't plan on using any more than 3 or 4 synths at once. Will it run Reason and other similar programs?