I have been testing on and off last night and have now seemed to have found the perfect voltage of 1.31v-1.32v on load for stability (3.1gb IBT 20+ pass) so we are almost exactly the same. My temps also peak around 60-62*C - almost identical. I would say you are solid. Do not run IBT for 24 hours, not even for 10...completely unnessecary and detrimental to your processors life.
20-25 passes at your highest memory is more than enough to simulate what you could real-world stress the PC.