I have never owned a Mac and want to try out Leopard. With money being tight these days, I have been looking at craigslist and ebay to buy a used Dual G4 Powermac. I know the minimum requirements are a 867MHz G4 but what about when running with dual cpus? I want to make sure that whatever I buy runs Leopard and does easy tasks like email and web surfing. So I guess I am looking for best performance for least cash while still getting to try out latest OS. Also, I have a 1680x1050 LCD monitor that I want to use at native resolution via DVI. Will this be possible with the video cards Apple used in these older powermacs? Thanks for any insights and recommendations.