You can use Scythe pc fans they are whisper quiet and move good air. That owul be my solution. Or setup a well ventilated rack with a door. Have cool air come in from the front bottom using 2x120mm scythe fans and have hot air pushed out the back top with 2x120mm scythe fans. Easy wall to setup these is go to radioshack and grab a couple AC to DC power adaptors (like the ones for cell phones chargers etc) grab ones that are like 5-10v, and 1amp cut the end off and solder the red/black wires to the fan cables (ignor yellow its for speed control in a pc) then you can plug em in to a powerstrip or an aux outlet on a receiver, so they only run when the rest of the equipment is.
~Bobby