I have to replace my complete air/heating unit. I live in fort Worth, TX. The house is 10 years old, needs a 5 ton. I have three bids, trane XR 13 seer - $3,700; Lennox XC 13 seer - $3,500; Carrier 13 seer - $5,200. I can make each of these a heat pump for $500 additional.
My questions are below.
1. Are these good bids?
2. Are these good units?
3. Which brand should I go with?

