wrote:

Do they accept GA aircraft?

Yes.

Are there landing fees?

Yes, but the last time I was there the FBO I used waived the FBO fee if I
bought a minimum amount of 100LL fuel at their high prices. There is also
a Port Authority fee that you will receive in the mail a month or two
later, but that is relatively small (US $10 or so).

Can anyone recommend an FBO friendly to visiting small aircraft?

I used to use Millionare weekly and they were very friendly to me as they
slid my credit card through their machine G, but I believe that they
renamed to Meridian Teterboro. I also used Signature for Angel Flight
patient pick-ups and drop-offs, but that waived the landing fees for me.

Go here if you haven't already to read of others' experiences:

http://www.airnav.com/airport/KTEB

If not Teterboro, what is the best option for landing somewhere whilst
visiting the city?

Another option is to land at Westchester/White Plains where it will be
cheaper, but from what I read the commute into the city will be 45 minutes
or so by train.

Assuming you are not arriving during early morning weekday rush, TEB is
only 15-20 minutes into Manhattan by NJ Transit bus, or 25 minutes by train
with one connection required.

--
Peter