Something else I noticed about the Orb II compared with the other two coolers was much better system temperatures – up to 7 degrees in the overclocked test.  To quote the Thermaltake website “Radiate aluminum golden fin provide sufficient air flow”.  Adding a bit more translation, the larger fan and orb-like construction provide much better cooling for surrounding components than the typical standard-fan-on-a-bunch-of-thin-fins setup.