A PPC 17" iMac. My wife has a dual-G5 PowerMac. Of course, you can't buy these models any more, but they've both been reliable.
An important thing is that you should probably buy directly from Apple. Every experience I've had buying from third parties resulted in Macs arriving with hardware problems. Could have been a coincidence, I suppose.
An important thing is that you should probably buy directly from Apple. Every experience I've had buying from third parties resulted in Macs arriving with hardware problems. Could have been a coincidence, I suppose.