a sedan service is flat rate, a cab can be $40 or more during rush hour and dirty as all get-out. call the hotel and ask for a recommendation. it should be $35 or $45. a lot of times the limo drivers hang out at baggage claim and you can get one without a reservation.
if you rent a car, parking can kill you at $25 a day at some locations. i dont know if your hotel charges for parking.
f