I live in FL too and Ive been calling for a couple of years. I started with abox call and worked my way up to the slate and then to mouth calls. I killed a big bird last spring using my mouth calls and my buddy was using a slate. No one call is better than another but experiment and dont be afraid to spend some money on a bunch of different calls and PACTICE PRACTICE PRACTICE! Find the one that you are most comfortable with and stick to it. A good place to go to hear the sounds of a turkey is the NWTF website. They have a link that you can click on the calls and hear them.

Good luck and where abouts in mid FL are you?