Sorry to hear about your need for a new AC.
I have replaced a lot of AC units over the years between My personal houses,offices and rent houses.
I usually use whoever I can get the best deal from on Angies List but have a friend of mine tell me Avery Air made him very happy
in April.He Said they were very competitive on the price and the actual installers were very professional.
I went and looked at the install.They did a topnotch install inside and out.I would also look at your warranty options because some of the bigger companies are offering 10 year warranties.
Good Luck.