Ok, took the advice suggested here and replaced the 25 year Lennox pluse furnace and AC. System is as follows. It was installed yesterday.
Heat Pump - 4TWX5030BI000AA (XL15I)
Furnace - TUH2B060A9V3VAC (XV95) variable speed 2 stage
Coil - 4TXCB042BC3HCBA
Thermostat - TCON802AS32DA (outdoor temp sensor installed propane to come on at 35*)
HVAC contractor did load calculation on my 2,300 sq ft single level with full unfinished basement? Took his word that this is a good setup based on data. Location is triad of North Carolina.
I do have a question about the thermostat. I have 8 wire Tstat wiring. I thought I read that you needed 2 aditional wires to run seperately from the outdoor sensor to the tstat to operate correctly. I'm not sure they wired it that way. Any help or suggestions woul be appreciated.