Very nice little setup you got here. I'll be interested to see how this works out. If it does well, I may have to try something like this.
I have some spare wood I can build me a little box out of, and plenty of fans.
One thought on the heat...you could use a Dremmel tool, and cut some bigger holes, and go with some 360mm case fans.
hxxp://www.xoxide.com/360mm-case-fan.html
Also, do you have all the fans blowing out, or intake on one side, and exit on the other? One last thought...I know my basement stays really cool all year long, if you have a basement, you might get some great results moving it down there.
Anyway, much green mojo to you bro! You're looking great so far!