I currently have a 1.25Ghz G4 Mac Mini, and I have been thinking about moving to MBP in the first half of 2007. My question is related to the CPU. We all know that C2D mops the floor with the G4. But how much faster is it, really? Is it faster, clock-for-clock? If so, how much so? If I moved from single-core 1.25Ghz G4 to dual-core C2D running at around 2.33Ghz, how much more CPU-power would I have at my disposal? 3-4 times as much?