If you're a member of Costco, I'd recommend their, "Explorer Pass." We just used it for a visit to NYC, and it was very helpful. The Costco version was $65 for 3 attractions, and we selected the Guggenheim, MET, and MOMA. The pass was almost worth it just to avoid the lines at the MET

Each of these museums charges $22-25 for entry. There are online discounts available for some attractions if you want more/less.