You'll still want to use the digital thermometer to verify the temps in the enclosure, you just want the thermostat there to control the temps. In other words, you need both. Adding the thermostat will really help level off your temps. The Hydrofarm is definitely your best bet if you are on a budget...the cheap ones they market for reptiles don't seem to be as reliable. Otherwise, if you want to spend the money ($100+) on a high end one the Herpstat is great. The other thing is, what are you using for tops on your enclosure? If they are screen, covering them 2/3 of the way with foil may help with the humidity.