Can anyone advise me as to a good car service to use in NYC for the airport runs?
When I lived in NYC we used Carmel: 212-666-6666
http://www.carmellimo.com/
We always just did the regular car, the cheapest one. They use Lincoln Town Cars, which is pretty common amongst NYC car services. Usually the car was nice/relatively new, but occasionally it was a bit older or slightly more beat-up. We never cared b/c it was relatively cheap, but everyone has their own opinions on what is important to them, so I figured I would give you the heads up.
Also - what we did for airport p/u's was to reserve ahead, and then they would have us call when we had collected our bags/gone through customs (if it was an int'l flight), etc. Then they would tell us where to stand and the car would arrive generally in about 5-10 minutes. I believe you can also have them waiting for you in ther terminal with a sign, but then you will be charged waiting time, which can really add up if it takes a long time for your bags to come out or for you to get through immigration.
Another popular one that probably operates in a similar fashion is 212-777-7777. I can't remember the name of the company, just that it was all 7's.
Hope this helps!