I went to the Apple store in Denver CO today for the first time. As I posted over in the PowerMac forum a while back, I am seriously considering getting a Mac for video editing, but I don't know what to buy. Today was my first chance to compare the iMac 2GHz and the PowerMacs in person and feel their "speed" and "snappyness". From my hands on experience, all I can say is WOW. The difference between the iMac (2 GHz) and the dual 2.3 was HUGE. However, I noticed in the about menu that the machines were tweaked. The iMac only had 512MB, the dual 2.3 had 1.5GB, and the dual 2.7 had 2.5GB. There was even a noticable difference between the dual 2.3 and dual 2.7 which surprised me. This leads me to a question. How much of the "feel" difference and load times I noticed was connected to processors, and how much was connected to RAM quantity? It was a very unfair comparison since not all the machines were running on 512. If I bought an iMac 2GHz and pumped it to 2GB, would it have the snappyness I am looking for on a single 2GHz?