What size is in there now? Not saying it is the correct one, but how did it cool you in the extreme Florida summers? Perfect/just OK/Poorly? any hot or cold spots in the house? Did it struggle during the summer?
The correct way is to have a manual j done on your home. You will be told here and it is true, that if you oversize, the ac will not remove the humidity correctly.
digitalplumber is just a name for use here, I am not a plumber!