Normally we use Happy Limo, but we used a taxi once when we did a last minute extension of a trip. I don't remember the exact cost, but the taxi was definitely more. Definitely go with the towncar! Price around and you can get a good deal (for example, Happy Limo has a coupon). Also, with a towncar you know what you are getting...not that taxis are bad, but the towncars are always nice, clean, and well-kept and will be there right on schedule.
Barb
Visit the Platinum Castaway Club at: www.castawayclub.com