I can purchase a Power Mac G4 800MHz Quicksilver model with mouse, keyboard, and 17 inch cinema display for $400. It features a 40 GB HD, and 512 MB memory. Currently I have a 12 inch G4 Powerbook, 1.33 GHz, 512 MB memory. How would the performance of the Power Mac compare to my powerbook? Is this a bargain or about what I should be paying? Thanks.