Your profile for the Mac you'll want points to several models, sorted by price:
- iMac G4
- PowerBook G4
- PowerMacintosh G4
The iMac would be a great computer, but you might want more from your new computer. Mobility? Get either the PowerBook 12" or the 15". Raw power? Get a PowerMac. You can use your old monitor with it, if you want to, to reduce the price.
However: The iMac 1 GHz seems like the machine that offers the most for its price right now. Otherwise I'd point you to the PowerBook G4 15", but we're all waiting for a new model to arrive that also sports Bluetooth and AirPort Extreme (and an Aluminum shell). So right now might not be the best time for buying the PB 15".
Mac user since 1987. Running Mac OS X 10.8 Mountain Lion on a MacBook Air 11" & an iMac 27" and whatever's newest for my iPhone 4s, iPad 3 and AppleTV 2.
Apple Certified System Administrator 10.6, Apple Sales Professional 2008-2011, Apple Certified Mac Technician.