There is Ben's Kosher Delicatessen Restaurant & Caterers. They are one of the most popular on West 38th Street. Mr. Broadway is also one on East 84th Street. From my experience, Ben's is the best with some of the best reviews!
Try the Prime Grill for the most interesting dinner menu, or get sushi and cocktails for happy hour. Tevere is a good pick for Italian, or you can get a steak at Kasbah or Wolf & Lamb.
Never been to manhatten . I hear the food is really great there .I would like to go some time to see for myself .The worlds biggest burger is made there .