Looking at the Mears Transportation site their Taxi Fare Estimator comes out at $93.75 one way plus tip (10%).
Another alternative is to use a Towncar company.
Take a look at
FL Tours or Tiffany Towncar to see how their rates compare to the taxi fare:
FLTOURS
TIFFANY
You tend to get a more personal service with a Towncar transfer. The drivers will be waiting for you in baggage reclaim with your name on a sign. They will help you with your bags and arrange a suitable time for the pickup for the journey back to the airport.
I've used both companies with no problems. Last trip
FLtours called me at the hotel to confirm the return journey pick up times a few days before we were due to leave.