I know you weren't looking for advice outside your request, but if you are in town March 29-April 1 you might want to check out the Association of International Photography Art Dealers show that weekend. http://www.aipad.com/photoshow/new-york/. Never been myself but might make it this time. It seems a great opportunity for viewing photography, about the same price as the Metropolitan or Modern but tons more photography to see.
Hope you enjoy your visit! I live about 2 hours from NYC but don't get there that often, and wish I could for an extended stay.
((The AIPAD Photography Show New York, one of the most important international photography art events, will be presented by The Association of International Photography Art Dealers (AIPAD), March 29 – April 1, 2012.
More than 75 of the world's leading photography art galleries will present a wide range of museum-quality work, including contemporary, modern and nineteenth-century photographs, as well as photo-based art, video, and new media, at the historic Park Avenue Armory in New York City's Upper East Side.))