My current "daily driver" is a PowerMac G4 "Mirrored Drive Doors" with a 1.25GHz processor, 2GB of RAM, and the stock 64MB graphics card. It actually does okay, even on YouTube, but what you have to remember is that my machine was the "top of the line" at the same time as the higher end iMac G4's, and it's currently "maxed out" with the exception of the graphics card. I could see where an iMac G4 could leave a lot to be desired as a daily driver, although if you want to go somewhat vintage, you could pick up a machine similar to mine for around the same price as a high end iMac G4. Even though I intend to get an early Core 2 Duo Macbook after Christmas, I doubt very highly if it will completely replace the PowerMac.