Ok the title pretty much asks the question. For a while now i've been having the air blow into the HS so that it was fresh cooler air from the room because i have my case side open because my HDD overheats because it has hardly any room to breathe. My cpu temps have been fine but i recently looked inside my case and notice that the HS was packed with dust. The thing with my CPU fan is that it is a Tornado and has the fins that change the direction of air flow to blow at a 90 degree angle onto the HS. I was wondering if it would be better to flip the fan over so it is sucking air through the HS and away from the CPU because inoticed on some cases there is a hole on the side of the case so htat hte hot CPU hair can be exhausted. This would prevent dust from collecting in the HS as much, but is it safe to have the spinning fan blades on the HS side when the fan was clearly desgined to have the air being pushed onto the CPU. Also any sugestions on a case that has a lot of room a lot of fan locations and is a decent price? I know the Xaser III is a good case, but kinda pricey. Any near Xaser quality cases that are cheaper?