Thermostats replacement

My class C motorhome came with a standard White and Rogers thermostat. Seems to work OK except it seems to be sensitive when it is jolted in any way by me working near it or even walking near where it is mounted. It will kick in the furnace at times when it shouldn't as if the temp has dropped. I have checked the wiring and all seems to be connected securely. It just seems to be a cheaply manufactured unit to me. My question is, is there anyone who has replaced one of these units with a better one, preferably digital, and if so what brand and model did you get. Thanks