Sorry in advance for sounding critical and pointing out mistakes, but i'd rather they got pointed out and corrected than left alone:
A point on paragraph number 3 (Page 4); even with the mounting gear the other way round (at least on my NH-U12P) you still can't change the CPU out, as the mounting bar stops the CPU socket release arm thing from lifting all the way, which means the retaining plate can't lift up. Is the NH-C12P mounting the same as the NH-U12P in this respect?
You wouldn't actually need a complete tear-down to swap out the CPU in either mounting setup, as you can unscrew one side of a mounting bar and swing it out of the way to allow the release arm to lift up (I've done it on my NH-U12P before).
Other than those small things, great review ^_^
Shame that it couldn't compete, but I'm not moaning as it means my NH-U12P is still good
One thing that i wonder is: would using the fan the other way round impact performance? If you have a case vent over the CPU area it would allow the heat to actually escape and could improve the performance.