My iMac G5 1.8 *sucked* on WoW -- inadequate video card I am told. Anyway, I had a Digital Audio G4 in storage and I took the upgrade plunge. RAM was already maxxed out so I installed an OWC 1.47GHz CPU (thanks MacRumors members for advice) and found a used Radeon 9800 on ebay. Now this thing blows the doors off the iMac G5 in gaming. Satisfying gameplay can still be had on these old powermacs, and I confess that I am a sucker for the G4 acrylic-graphite-Jetson's look. G5 design strikes me as merely business-like.