I use 2 Herpstat Pro's for my racks, incubator and ambient room temps(400watt heater) i also have 3 Rancos that I use for my quarrantines and a backup up room heater(1500 watt heater). I keep my back up heater a few degrees below the other heater in case the 400 watt cant keep up(cold snap) or breaks.

I used to use only Rancos but once you go Herpstat you will never go back.