HI. I would say that a towncar would be the most efficient and exciting way to get back and forth from the hotel. If money is your concern, it may be a little expensive for just two people, though. I think it just depends on what you want. If your DD is young, it could be fun to have her name on the card when the towncar people wait for you near baggage claim. I had a friend who did that and her daughter was thrilled to see her name. I think they used Tiffanytown car. We have used Tiffany three or four times and they have been on time, every time. Most times they are early. We have had our planes be early (20 - 30 minutes early) and tiffany has always been standing there. A towncar will probably run you anywhere from $85-120 before tip. I do not know what a taxi service will charge.
The taxis however are wonderful if you are staying at a Disney resort. They are always available. We recently took one from PORFQ to Seaworld and it was so nice to call down to bell services and they had a taxi waiting for us in less than five minutes. Sorry I can't help with prices for the taxis, but I thought they were easy to use.
Happy Planning