Thermodynamics is trickly business, especially with generators like CPUs as heat production changes from one second to the next.
One solution would be to use a CPU with as few nanometers per transistors as possible and that runs on a lower voltage rating but also, use special thermo-conductive filament between the core and the heatsink. Copper would be the material of choice for the heatsink core but the fins themselves would have to be aluminium. An aluminium top panel would be a good idea as well. SInce BDP-3 would inevitably cost more than the BDP-2, this would be preferrable to steel.
In fact, I'd feel a lot better if the BDP-2 top panel was aluminium as wwll. I live in pretty humid and hot climate and it does get uncomfortably hot.
Cheers!
Antun