I had the sudden thought, to try a "bigger" air cooler.
I happened to have an older, used, OCZ Vendetta 92mm tower heatpipe cooler, with a replacement Arctic Cooling fan on it.
I figured, the cooler's bigger than stock, and bigger, with more heatpipes and fins. Surely, it must be better...? Nope!
Max temps with stock cooler, stock CPU, was 72C Package Temp., in HWMonitor.
With the OCZ Vendetta, it was 79-80C.
Then again, maybe I should have run the fins under a faucet, minus the fan. There might have been some dust in-between the fins left over from prior use.