dude honestly mount it how ever you want.
coolermaster drilled (i cut the mesh out) the bottom of the case so a power supply can breath cool air from out side the case for a reason. if they didn't want the fan on the bottom then they wouldn't have spend the time on putting the holes there. your the only one here looking stupid fighting about how something as little and silly as were the air that cools the power supply should come from, inside a warm case or like all the new high end cases, from the our side and blows back out the case.
It just is what it is and people have a problem with that..