I played with a iMac core duo 20" 512 Ram yesterday in a shop. It is very fast with native apps. Dashboard loads in a nanosecond, iphoto and garageband as well. I found frontrow a little bit slower than on a G5. The thing that is striking to me is the Ram consumption under Rosetta. I tried running Safari natively and activity monitor showed 16 Mb Physical Ram required after loading the main Apple page on www.Apple.com. Then I run it under Rosetta (you can do it by clicking the checkbox if you open the info panel) and the Ram requirement was 35!!!!!!! MORE THAN DOUBLE!! Speed was comparable between the two. BUT: The machine was running only that app in that moment. Consider that you have Safari (under Rosetta for Flash content), Photoshop, Office (open at the same time). Ram needed for the apps will be much more than if the apps run natively. I don't know if in this case speed would be affected. TAKE HOME MESSAGE: If you use Office , Adobe things (both becoming UNIVERSAL in 2007) or other Rosetta driven apps, G5 is still perfect or at least you have to max the RAM at maximum. That's why today I place my order for a good Powerbook 12" SuperDrive, tiny and if I need it on the desk I link it to a 20 inch Cinema. For 2-3 years it will be perfect for me. MacBook Pro is too expensive, considering that you have to max out Ram. ANdrea, Trieste, Italy.