RE: Post-Theatre w/ Mom
Becco, on 46th between 8th & 9th, has a great all-you-can-eat pasta special for $21.95 that's very popular. Otherwise, if you are ordering off the menu, you might spend about $80 for two. Those are dinner prices, of course. If you eat before the show, you might spend considerably less.
Becco is one of several restaurants owned by Lidia Bastianich and her family. You may recognize here from her cooking show on PBS.