I have a powerbook G4 for some things, but my primary comp is a dell (i know) Pentium 4 2.66 Ghz, with 512 ram. How much faster would a 2.0 core duo iMac be? I will be getting a 17inch mbp with merom and I can tell that would be too hard to speculate, but if its good enough I would probably spring for the iMac as well. Thanks