The EZ2 would probably work. Can't personally vouch for it since I have a different model, the Redline 2. I don't like dials much, but a dial on a proportional thermostat is still a whole hell of a lot better than a dial on an on/off model. I read through the description for the EZ2 and it sound like it has everything you need. Pretty nice features for a barebones unit. As long as the combined wattage of the two 12qt racks isn't over 300 (and I don't think they should be) you should be fine.