I'm going to purchase a new AC unit this week. I found a few guys who will do it as side work...I simply pick the unit, they get it from a supplier, and they'll install it. I was looking at a Lennox or Trane...not the builder quality, but one step up. I'll get a price list tomorrow, but was told that brands like Goodman, Thermal Zone, Coleman, York, etc will be much cheaper. Can somebody recommend a good mid level model? I'll likely be moving in less than five years, so I can't justify the higher end brands.