I second the Peninsula. Its on the corner of 55th and 5th, right in the center of all the shopping and right near central park. It is a beautiful hotel, and is definitely one of the nicest in NYC. In the same neighborhood are the ritz and st. regis, which are on the other side of 5th avenue (also on 55th). I would stay away from the Rivington because the lower east side isnt exactly where I would want to stay if on vacation in NYC, although you should definitely visit. The hotels in the meatpacking district are more trendy, but much further from the main sightseeing you would probably want to do.
ZPP, ZSP, Xenons, Nav, Heated Seats
Past: 2002 325i sport 5mt, 2007 e90 335i, 2004.5 audi a4 1.8t GIAC stage 1+