We (a family of 4 with 2 teens) are heading to NYC for a week in August and would like to see a Broadway musical. Reading through the posts there seems to be discount tickets available at tkts booths the day of the show. Should we go this route or buy them through the discounted sites online? We would like to pay less than $50 a ticket and really don't mind which show - definitely a musical with a nice set - Wicked, The Little Mermaid, Shrek, Mary Poppins, Mama Mia, The Lion King, South Pacific Etc. Any advice?