Heater/Fan Controller

[gobytron]

in any case, go with a RK Lite if you want to have a few more bells and whistles and pay a minor premium.

You can also find the older apex jr's, with the blue screen and green back lit display for cheap.

Lots on RC right now in the 100-150 dollar range.

If you just want simple heater and fan control, get a more rudimentary controller like some of the ones posted above as they seem to range in price and quality with very similar functionality, so there is definitely something out there that is a good fit over both considerations for you.