I've recently had a large AN removed by Dr Jafar Jafar at NYU, together with ENT Dr Kohan, also in NYC. I also found Dr Jafar impressive, same for Dr Kohan. They are both well-published specialists in this field. I also went for a second opinion somewhere elose, but decided to go with these doctors. They did an awesome job in the removal of my AN.
Any questions, please let me know, as I have just gone through (and am still going through) the procedures that are involved with an AN at NYU. I'd be happy to share my experiences with you.