This is the thermostat I use. Good price and works well.
http://www.amazon.com/Hydrofarm-MTPR.../dp/B000NZZG3S
and for a thermometer and hygrometer combo I would suggest this. It isn't the one I use but I know others who use it and it works just as well.
http://www.amazon.com/Chaney-Instrum...9981366&sr=8-8