I was in an Apple store yesterday and was playing around with an aluminium 24" iMac and the thing that really struck me was just how SMOOTH the animations in Leopard were, such as for Expose and Spaces. I had a 17" Hi-Res MBP for 5 months with all the latest updates installed, and whether it was running from battery or the mains, I never got animations or transitions as smooth as on the iMac. I don't understand. I always thought of the MBP as a high spec machine, and with it's 256MB GeForce 8600M GT graphics card there shouldn't have been any difference between itself the iMac. Especially as I remember people dissing the iMac's graphics card when it was released. So what's the explanation? Many people use their MBP's as desktop replacements when connected to an external monitor but it seems as though an iMac would offer a better user interface experience!