though i don't know much of dehumidifiers, i do know that in florida you must be careful not to oversize your air conditioner. if you do, it will cool off the house too fast without running long enough to take out the humidity and so you wind up with a cool but wet house. i would go with the manufacturers suggested size depending on your amount of space.
"off with their heads"~~dr. joseph-ignace guillotin
"life should begin with age and its privileges and accumulations, and end with youth and its capacity to splendidly enjoy such advantages."~~mark twain - letter to edward kimmitt 1901