Hello, I DJ off of my macs, I have a G4 PowerBook 1.5GHZ computer. it is starting to feel a bit doggy with my software.(Torq) I am looking to get a machine, desktop or notebook, that would be faster for relatively cheap. I have been eying up the PowerMac G4 DP models. Would a DP 1GHZ model G4 Give me significant improvement in performance? does Running Leopard VS. Tiger see any different performance on a G4 1.5 GHZ? any insight would be helpful. thanks.