Maybe give realbench a try? It's video encoding and gpu cuda work so it puts a normal amount of load on the cpu and some load on the memory controller and pci-e links, a good test for everyday stability.
Yeah I think realbench is a good stress test. The other stress tests run your cpu ridiculously hotter than they would ever run in real life causing your overclock to fail purely because of thermal stress.
But in a worse case scenario the OP overclock is stable or within 25mhz of being stable, it's nice to see the quality of the newer 3600's seems to have increased a good deal.