The one thing you want to see with any cpu cooler is something that draw the heat off of the hsf so it does get blown out away from the cpu itself. You definitely want the front fan drawing in the cooler air that will see temps drop noticably.
In June someone pointed out a 4th of July sale at FRYS and I simply grabbed one for the new build then. Just lately newegg had an email flyer about them finally having a sale on the 900. It took them far longer then everyone else.