you have to remember that the hotter any component runs, the shorter its lifespan becomes.
that's the primary advantage of a superior cooling system. prolongs the lifespan of the hardware.
the extra overclock you may or may not get out of it is a fringe benefit.
at least that's how i view this issue...
“I hate to advocate drugs, alcohol, violence, or insanity to anyone, but they've always worked for me.” - Hunter S. Thompson