For reference, I believe the Met is up at Lincoln Center, which is in the low sixties west of Central Park.
Uncle Nick's, around 50th and 9th Ave, is ok and always a decent meal, but Santorini in Greektown is far better.
For an occasion, I can highly recommend Benedetto on Restaurant Row (48th?) west of eighth. A beautiful room, professional staff, a very good value (but not at all cheap) pre-theater prix fixe menu.
From accumulated chow notes prior to an upcoming visit:
"Grand Sichuan 745 9th Ave, 50th/51st 212-582-2288
Chicago is my spiritual chow home