Some alarm settings by board manufacturers are simply off the mark. I learned that early at RKN forum on my first Asus 775 board... I think especially the ASUS tools are really bad. On OC I start worrying if getting beyond 75°C (single core) although the i7s don't seem to bother getting into the 80s. But I don't like that on permanent use.
I think a good mid-prize cooler is the Alpenföhn Brocken. Some great high-ends (and high-price) are the Super-Mega, Genesis and Noctua NH-D14. But except for the Super-Mega all of them are hard to handle in a case and can pose problems on mounting/compatibility. But brilliant in cooling.
Oh, and I do love liquid metal pads. But the burn-in is a bit risky...
And I like
real temp and
TThrottle for reading temps on DC. For reading more,
HW Monitor is great.