As a wild card what about the sonic tower (with a mid mounted 13cm silentwheel fan). Can be used totally fanless if not overclocked and not being thrashed.
Cooling is very impressive. (e6600 idle at 28-31 degrees) with the fan on lowest speed.... overclocked to 3.3Ghz.
Installation is an absolute nightmare on LGA775 boards. Involves a long staick and a pair of brass balls.
i'd have to say, cnps9500, ninja, or sonic tower... sonic tower is the best air cooler as of now, ninja falls behind it, and cnps is just shorly behind the ninja