I am currently in a position that I need to replace my geothermal unit and am considering two different units. I am trying to determine If the cost of the upgraded Climatemaster TE 30 is worth $1750 more than the TZ22. I am basing the my decision on the timeframe to recoup my upfront cost. I live in the eastern part of Pennsylvania and my home is roughly 4000sf including the basement. Any suggestions on which unit to select would be greatly appreciated.