I have received 5 quotes from 4 different contractors for a dual fuel system. All 4 contractors pushed Trane XR13 units. However, the general consensus was that Goodman makes a good product and is gaining popularity. I had a Goodman in another house and was generally pleased. Would it be better to install the Trane XR13 4 ton heat pump with a Goodman 95% gas furnance (non Variable speed) or install a Goodman 14 Seer High efficiency heat pump with the 95% Gas furnace with Variable speed? They estimates comparable in price.