Sure, this one is a good deal as it does both heat and humidity with the option of adding CO2 controller later oncool phuk that looks nice, but that model does not allow you to turn the fan off completely. If I were to spend money on a serious controller I would like it to control many things as you say. Although I agree the one you found is fairly cheap it only controls fan speed.
Phuk or anyone else know of a good controller under $400? Those nice ones at the store sell for around $700-$1500 I noticed. not worth it.