As I can't get a C2D E8600 for anything I'm prepared to pay, I have incoming an E8500. So I'll run the 10,1 iMac up to 1.333GHz bus speed, and upgrade the RAM to the same speed. It's a small tweak, but hey, why not? And gives me a reason to dive in an drenew the thermal paste. At the same time, I'll try and resurract the optial drive, as it will only occasionally recognise a disc. Probably full of fluff, as the rest of the machine was the first time I opened it.