I keep hearing people talk about digital thermostats. I currently have two XV80 variable speed 3 ton trane furnaces up in my attic. One for upstairs the other one for down stairs. I keep hearing about two stage thermostats and various other fancy thermostats. Currently I have a standard electronic thermostat (Hunter). Basically it has a heat or cool switch. The thermostat allows me to have 4 different cooling or heating settings througout the day. I just set the time of day and temperature for these 4 settings. What would be the advantage to purchasing a 2 stage thermstat? I believe that would be the correct term for it. Hopefully I am making sense out of this message. I appreciate all the input that I have recieved in the past on this board. It is a wonderful information source for a consumer like me.