I just ordered a revB iMac G5 20" and plan to run Photoshop. It will arrive with a Gig of RAM and a 250Gig HDD. Will this work out okay? The reason I ask. is that some people claim to run PS on a Powerbook while others claim that you need dual processors and as much RAM as the Powermac will hold. I like the looks and reviews I have read on the iMac and if it will not run PS smooth, I just wont bother with PS.