If I were you, I would get a Herpstat 2, an 80w RHP from Reptile basics, and a 2' section of their 12" heat tape.

Is it cheap? Not really.... but owning animals isn't cheap. LOL... What it will give you is an excellent setup in which once you get it set up and dialed in, you really won't have to worry about.

I went the "cheap" route at first because I didn't want to invest "that much money", and was never confident in my thermostat or heat sources. I am now running a T8 with the setup I mentioned and could not be happier.