Wayne, You're making it way too hard, 8^)and not nearly enough fun for DIY guys. Just need to start adding Peltier coolers to the enclosure mounted on a nice heavy aluminum backplate. (May take a "few" if you are really putting the screws to a low efficiency driver.)
See the fun peltierbeer link!
http://www.electronickits.com/kit/complete/peltier/ck500.htm
Dan