I might be getting a nice promotion and payraise at work and I'm considering either buying a new powermac G5 (1.6 GHz) or a used powermac G4 (1 GHz, mirrored door) from PowerMax.com. So I have two questions, should I buy a G5 already since they JUST came out or should I wait on them for awhile till a better model comes out (does it matter?) And also, has anyone had experience trading and buying used macs from Powermax.com? I want to trade in my Indigo 500 MHz iMac and, if not a G5, then that used G4. What are everybodies opinions and suggestions? I've never bought a computer before and I'm very unsure about everything.