I've very recently assembled a new rig and was wondering to see everyone's preference of a case fan configuration. I've been eying Corsiar's AF140 LEDs for front intake,but am open to other fan suggestions. My question is, would it be recommended to replace my cases top and rear 120 exhausts with a 140mm and 120mm respectively or would 2 120mms be ok? My case is a NZXT s340 if that warrants any additional recommendations. Thanks.