Being a native New Yorker, let's just say I've seen just about every musical that's appeared on broadway in the last 20 years. Most recently I saw Spring Awakening (agreed on the sexual stuff, hehe. But I am so not complaining about that), The Color Purple, Sweeney Todd (it was on broadway last year), Avenue Q, Wicked, Rent. I've seen les mis, mammia mia, phantom and so forth.
You can get cheap tickets for broadway, there's a half-price ticket booth inside the Marroit Mariquis hotel for same-day showing of Broadway shows. There's no need to pay $400, that's only for the most exclusive seats.