Thanks for the advice everyone. After an annoying flight (fellow passengers, rather than anything airline related), it was great to get right into a Dial7 car. It was a big TownCar, very clean, and was nice to be able to stretch my legs after having my knees in my face all flight. He took the Brooklyn Bridge and so it was $29 plus tip, no tolls.
Took a cab back on Sunday since I wasn't sure of where I'd be, ended up being exactly $29 plus tip as well, which I thought was interesting.
Both took the same amount of time I'd say, if I had been going in the opposite direction either time, I would have wanted to be in a car rather than cab since traffic wasn't moving.