Since Florida is such popular destination for seniors it stands to reason that there would be a lot of options for Medicare Advantage and Medicare Supplement insurance in Florida. That being the case there are a lot of choices. AARP / United Healthcare Medicare supplement plans are among the best, since the plans themselves (A,B,C, etc.) are standardized it really comes down to the price and of course customer service.
There are also a multitude of Medicare Advantage plans available. These typically have no premium and the agents that market and sell them can be very aggressive. It is important that you evaluate each option and ask questions until you completely understand what you are signing up for.