I have nearly same system as you and mine idles and maxes at same temps. Ambient temps make a world of difference. For insance, my CPU will idle at around 41-42C when the temp of my comp. room is 24C, but as the room temp increases as does the cpu temp.
I have 4.0 OC @ 1.26V. Might try that 4.2 @ 1.3 and see what happens. Like I said I have same PSU, Cooler, and CPU.
I've been running this OC since I finished building the comp which was a over a year ago and its still running strong. Anyone that tells you i7 930 shouldnt pass 60C on load is full of it. These processors can take upwards of 80-85C like nothing. There just isnt enough conclusive evidence to tell somebody "if you run your processor 5-10C hotter than another guys it will last X months/years shorter"