17-35 is a must in the Oculus and for basic street. Then a longer lens for taking a ride on the Staten Island Ferry (this is a real good thing to do since it is free and will give you great shots of lower Manhattan and the Statue of Liberty). Take a small shoulder bag with the 70-200, and use the 17-35 for most shots. Even at 35mm shots from the ferry would be show the skyline too small. Also a walk through Central Park will give you some good opportunities to use the longer lens. Take the D750 because you will not want the multiplication factor of the crop sensor in places like the reading room and the Oculus. If you have time, take a subway to Brooklyn and get off at the first stop. Walk up onto the Brooklyn Bridge and walk back into Lower Manhattan. It isn't a long walk from there to the Oculus and the 9/11 memorial.