If the 156w Pelts are the ones on dangerden that your using. They are rate at vmax of 15.8v and 16 amps. Youll probly be running them at 80% vmax so thats around 13volts.
So as i mentioned in the other thread. You may want to check out:
http://mpja.com/product.asp?product=12640+PS
.
At $160 per power supply it isnt cheap but is the solution ill be going with for that particular TEC. Btw, you can adjust from 0-15volts which means youll be able to find the sweet spot for the TEC.