I would highly recommend PIPCO Heating and Air for HVAC. They did my A/C and furnace two years ago and were very well priced compared to others. Their work was very well done as well.
I sell HVAC equipment, my company also deals with water heaters etc.
as Shamrock said with the new gov regulations made the price of water heaters skyrocket and most places are having a hard time finding supply for the demand of water heaters.
As for the HVAC side I sell American Standard which is the same as Trane.
The company I would recommend is Air Tech Refrigeration, Talk to Chris @410-335-3668
Message me your name so when he calls I know who you are, tell him to let me know your name and I can get you little better pricing then I would give some random person.
PM sent. Just looked and the equipment I'm replacing is Bryant. I live in condos that have the AC unit in the wall off the balcony storage closet so I would guess there aren't many makers of that equipment. Do you know anything about Blue Dot or Charles Klein? They were recommended to me by a couple of Realtors