If you want to stay in Florida I would not consider Republic. Not only will you have to commute from the outset, but when you can hold the left seat MIA will likely not be the junior upgrade so you will wait even longer for that. Envoy can give you no commute from the beginning and faster upgrade and MIA would be available for that also. Silver is another option in FLL. Also the only major that has a base in south florida is AA and envoy takes you directly there. Jetblue and Spirit are also on the table if you want that to be your career company.