Venom Visual Scopes

I am in need of a exhaust system for my home theater. i have to much going on. 1 receiver, dvr, home theater pc, playstation 3, xbox 360 w/ hd-dvd rom, and charging for controllers and logitech 880 remote, I also have a LG tv which can get warm all this is housed in one of those hometheater entertainment center that has 2 towers on either side of a lower base for the tv where the devices go under and gets very warm. the towers are smaller for dvds.
i want to mount 2 fans behind each device. No glass in front of device so for now everything will exhaust. i am using computer fans prolly 4inch ones. i am wandering i want to have the system controlled by a thermostat and i need suggestions on what to do. i am using the old trip method where u put one side of a wire in the psu green hole and one in the black and that turns it on with one simple switch i want to put a thermostat in the middle. does anyone now if this is possible if so what thermostat would u recommend