I personally would go with a johnson control over a ranco. I have used both for about 2 years now. Both work well. I just like the fact that if your probe goes bad on a johnson you can replace the probe for like 10 bucks. I found that ebay is a good way to get ranco thermostats. I picked one up for 20 bucks a few weeks ago. I haven't had luck finding johnson controls on ebay but rancos are a dime a dozen.