The hell have you been smoking? Nearly 70c at stock voltage and frequency is atrocious.
Don't worry about your temps with a cooler you're replacing. Put the Hyper 212 on and check the temps then. Who cares if it's overheating now. Won't have any effect on whether or not it's overheating with a different cooler.
I don't see how those temps listed there could possibly be accurate. A max of 48C on the hottest core in Prime? Stock or not, that's damn cool for the stock HSF. I know I never had temps anywhere near that low in Prime at stock with the stock HSF (upper 50's-lower 60's).
Never mind the fact that the lowest idle temp was lower or just above (depending on the core) the lowest ambient case temp. Damn near impossible with the stock HSF.