Your options:
Public Bus: Pro - cheap! Cons - will take a while (I believe it involves a transfer), difficult to deal with luggage.
Rental Car: Pro - you get to be in control. Cons: will be more expensive than some other options (though cheap rentals abound), will need to drive (we don't like to drive strange roads). A small cheap rental may not fit all your luggage. Not everyone can rent.
Taxi: Pro - right there at the airport, no prearrangements necessary. Con - not all taxi operators will take you the most effective way - its possible to run up the meter.
Towncar: Pro - a driver for hire meets you at the airport carrying a sign, helps you with your luggage. Often includes a grocery stop. You'll know the price when you book. Cons - towncar drivers occationally don't show up, need to arrange in advance. Won't have a car available while you are there.
Limo: Pro - what a way to go! Cons: Expensive
Mears Shuttle: Pro - for two people its fairly cheap Con: Sometimes you have to stop at a lot of hotels before you reach yours. A towncar will be cheaper if there are four people in your party.