I agree regarding Jean-Michel Jarre. Apart from Oxygene & Equinoxe which came out when I was still at school he's kinda left me cold too. Zoolook is a good album though with amazingly good production. That's the one, excellent anthemic tune. Turn it up!
I know what you mean but I don't actually notice much difference to be honest. The open structure helps a lot in that respect, I think. My Mac, on the other hand, is running very hot these days. Worryingly so actually