My quotes on the Trane and the Tempstar are almost identical. It would be the Trane XR13 or a Tempstar (no model on the quote but it is a 13 SEER) and both are 4 ton units. Both HVAC companies have a good rep. The Trane would come with 2 years on labor and the Tempstar with one year on labor. I've been leaning towards the Trane since the name is more known - and we thought that might have some significance since we want to move (downsize) in the near future. We have to get a new unit because our 1988 Lennox is leaking fast now. The charge we had last July is gone. We want to keep our very reliable Lennox Pulse furnace - so we need to stay with the 13 SEER on the A/C. Any recommendations or advice would be appreciated.