I am with martin82531 on the recommendations. I don't like having batteries inside the enclosures. Accurites are not in my experience the best one I had was just under 4ºF in error (just inside what they will replace it) and two over (replaced under warrantee).

I would go on to recommend a fail safe thermostat. A second on/off unit that would shut down power if the probe got pulled loose of the heat or failure of the triac chip. A VE100 would be a good choice. I think every thermostat should have one unless it has a mechanical back up system and over and under shut off settings. I believe there is only one unit that has these the herpstats. They maybe the only ones exempt. The cost of a fail safe is small compared to the heart ache if a probe becomes pulled loose. There have been a number of people whom wished they had one over the years. Thermostats are not a place to save cash.