I have two of these. One for my bedroom and one for my snake room. I have had them a few years now and they have served me well. The built in setting work well and the remote is a nice touch. A few others here use these as well. Its similar to what Eric suggests in the link he provided. They seem to work well for us and our collections.
http://www.lowes.com/pd_100813-33454...+filled+heater