I live in south Florida, so a central AC is mandatory, to say the least, almost year round. The existing unit, about a ten year old Rheem with an 11 seer, 3 ton, is ready to be retired. We have decided to go with a whole new unit, (compressor and air handler). The compressor is located outside the house, on the north side, and the air handler is in the garage, easily accessible.
Never having done this before, I'm wondering what to look for before I speak with several local installers.
The house is around 1,500 sf under air. Any one manufacturer more worthy than the next? Any to especially avoid? If I were to base my decision on marketing, Trane is the way to go down here. But who knows if that's correct. I do know they get a pretty penny for them.
Our expected stay in our current residence is more than likely short term, say another year or so. At which time we will either sell, or keep as a rental unit.
Your opinions are appreciated. Thank you.

I'd not dwell too much on the brand; In the size and efficiency that is recommended for your home, you'll have similarly priced choices amongst the name brands.

As for the estimates, for big projects like this I usually get 4: 2 from the biggest companies in the area and 2 from smaller companies.

I would sure be interested in the quotes you get. I need to do something pretty drastic myself.

I'm happy to say the job is done, and I am pleased with how it all went. I replaced the existing unit with a similar one. I ended up with a Rheem 3.5 ton, (up from a 3 ton), SEER 13 model. Threw in a new programmable, digital thermostat, too.
The difference is noteworthy. It's quieter, the air blowing out of the vents is much cooler, and the unit now shuts off. Something the old, inefficient one would almost never do. This one will reach the set temperature and shut off for a while. Combined with the new ridge vent in the attic that was installed a few months back when we had the roof replaced, and I'd say the house is a heck of a lot more comfortable.

Thank you. I guess going that would make it worth it at any cost!