I would say you are looking about as good as you can under the circumstances. I mean the stock cooler has to run that hot too(and sounds SOOOO loud).
The only other thought would be a second
fan on the heatsink, but again, you are looking at a few degrees at best in most cases.
I would keep an eye on the day to day temperatures. No way for 60 or even 70c to hurt the cpu from a silicon standpoint.