I am looking to replace my 20 year old Trane forced air furnace/AC unit(propane). I was offered a Payne by one of the contractors. I don't know much about that brand, the price is good, but if the quailty and reliability are suspect, I would rather pay more for a better system. So, I'm here to solicit the opinions of the experts. House is 2000 sq.ft. in Wisconsin.