Most of the tstats you find at the pet stores are not that great. I personally like Herpstat. I have two Herpstat 1s, a 2, and a 4. If you can afford one, do it.
You want to buy the best tstat you can afford. Buying cheap ones means they will eventually fail and you will spend more money replacing them. Buy it right the first time.
http://www.spyderrobotics.com/store/...ain_page=index
There are others out there but the Herpstat is top of the line. Search the forum for others. They get talked about alot.
I would get a smaller watt bulb. I would think a 50 or 60.