I have 2 Sunon 80mm 45cfm and 2 Antec 80mm (27cfm?)that came with the Antec SX-830 case. I have the Sunons mounted in the front of the case with the top front Sunon blowing out and the bottom front Sunon blowing in. I have the Antecs mounted in the rear of the case with the top rear Antec blowing in at the HD Drive Cage and the bottom rear Antec blowing out. I placed them this way to get some airflow onto the 7200rpm 75GXP. My question is, does this seem optimal? Or would it be best to have two in front blowing in and two in the rear blowing out. What do you guys think?