I have 4 80mm fans. 2 in front @ 2 in back. 1 is in front of my hdd's & the other front is pretty much @ the bottom of the case. the 2 in back are basically in the middle. 2 front suck in & 2 back blow out. 2 of the fans I bought separate & 2 came with the case. It is an Antec case. The 2 fans I bought separate are a lot stronger than the ones that came with the case. how should i arrange them? 2 strong ones in back or front; or 1 strong with a weak on back & front? should I have the strong or weak in front of the hdd's or @ the bottom where is is pretty much unrestricted? If a strong & weak together is preferred then does it matter which is on top or bottom? i am just trying to get the most efficient cooling ability with what i have. Hopefully this is not confusing..