I have decided to buy a Trane Dual Fuel natural gas/heat pump system from a local dealer. Because I live equidistance between two respected HVAC shops, I asked for quotes from both. The furnace and heat pump are the same on both quotes, but the thermostats are completely different.

Models are:

#1. Trane XV95 Furnace Model#TUH2B080A9V3V

Trane XL15i Heat Pump Model #4TWX5030A1000

Trane Digital Thermostat #TCONT402

#2. Same furnace and heat pump

Trane Digitial Thermostat XL802

I only want to do this once, and I want to do it right. I don't mind spending the money to get the ideal thermostat; the thermostat is a very small cost compared to the rest of the system. I want to be able to control day/night temperatures and humidity levels. (Not included now, but possible later on, is a Trane whole house humidifier system if that makes a difference in thermostat selection.)

My questions:

1. Is either thermostat the ideal one for getting the most out of this system?

2. If not, which Trane models should I be asking about?

3. Is there a model other than Trane that I should be considering?