Here's what I have found so far. I think I will go with these fluid drive fans, there 120mm and only run at 8dba at 800 rpm, virtually silent.
http://www.coolerguys.com/sff21.html
I'm thinking about running 4 of these, perhaps with a Silent X 4 channel fan controller.
http://www.newegg.com/product/produc...82E16811999167
Still trying to figure out if I want to control the cooling system with a thermostat.
Being a fireman I've always been a 'fan' of positive pressure ventilation, I can ventilate an entire house with one gas fan blowing in a door way and 1 window open at the farthest point of the house, seems like the fans set in intake mode would work the best. The key is have your exhaust hole 1/4 to 1/2 the size of intake hole(s).
I'd like to get a intake filter, something like this,
http://www.triktags.com/html/fan_vent_panels.html, except sized for the 120mm fans.