It looks great!
I have a Herpstat 1 and I love it. I think their cheapest thermostat that does two racks is the Herpstat 2 at $195, so it's not too expensive. Depending on how many racks you plan on having in the future, you may want to look at the Herpstat 4, as it does 4 zones and not that much more expensive at $339. The Vivarium Electronics VE-300X2 also does two racks, and it's the same price as the Herpstat 2.
http://www.spyderrobotics.com/home/products.html
http://www.reptilebasics.com/thermostats
Hope that helps!