I recently purchased a PowerBook and have fallen in love with the thing! I have now upgraded my new PowerBook 12" G4 to 1.25GB RAM and Leopard. I am considering upgrading the hard drive. I have seen 80-100GB Hard Drives 7200rpm going for about £50 and the KingSpec 64GB SSD's going for £80. Capacity is not too much of a problem - I can make do with 64GB, but is there a significant speed increase over the 7200rpm? I currently have the stock 60GB drive in the machine (which I am assuming is running at 4200rpm) Thanks!