Can anybody tell me (from experience, preferably) what the differences in speed (both CPU and GPU) will be between my trusty old iMac G4 (original 15" 800MHz model) and the new iMac 24" (with the stock 2,16GHz Merom, but with the BTO GeForce 7600GT) would be? My machine is really beginning to show it's age. I think that's perfectly fine though, since I've had it for way over 4 years now, so it's okay to buy a new machine soon. Everywhere you read comparisons between the G5 and Intel iMacs, but nowhere a comparison between the old G4's and the new Core 2 Duos. How much faster would a machine with a 2,16GHz Merom, a GeForce 7600GT (256MB) and 2GB RAM be, than a machine with a mere 800MHz G4, a GeForce 2MX (32MB) and 1GB RAM? The Xbench database shows a rough 4-5x difference between the machines. Is that really true? That's gonna be quite the jump, then. I've never gone up so much in performance between two successively owned machines. Nice! I have also still not decided if I should wait for January (MWSF) or just go ahead and buy the current 24" iMac. Something tells me the current models are 'just' transition machines, and in spring 2007 we'll get the 'real' Core 2 Duo iMacs. With Conroe, that is, or else maybe with Merom/Santa Rosa. Any thoughts about that?