I have a leaking coil on an 18 year old unit. I got a quote to replace the coil for $3800. The quotes I'm getting for a new 2 ton Trane system are $7900-$8900 (some are higher but it's not my main AC unit so I don't feel the need to have ultra quiet, etc). I want a second quote at least for both a coil replacement and a new unit. Any contractor recs? Much appreciated!