I have a G4 APG Mac with a number of upgrades, 1.5Gb RAM, 200Gb HDD space, 1.6Ghz CPU and 64Mb video card with 19inch LCD. But being 8 years old it's showing it's age. I need it for Photoshop CS and other graphic work and have seen some great prices for G5 Powermac on eBay but don't want to buy a dud, on the other hand I'm limited in what I can afford so any new Mac would have to be a base model iMac, MacBook or MiniMac. All of which once spec'ed with more RAM and HDD space will be about the same price. Which is my best choice?