Hello everybody! Okay, I've got a question... I'm looking at buying a dual G4 PowerMac. It will be used for desktop work (chat, browsing) and photoshop. It will run OS X. What would the performance be like between dual 500's, and, say, dual 1GHz's? Either of them will likely be upgraded to 1GB of memory. Or should I just skip the G4 PowerMacs altogether and aim for a G5? Thanks!