The New Amsterdam Theatre is owned by the Walt Disney Theatricals. And judging from Aida, I'm not sure they could do much better than The Lion King, which still sells well and wows audiences. Despite the acting, it's still a beautiful show to look at. Not that I'm saying that's why we go to the theatre, but I think what Julie Taymor did was pretty amazing and pretty bold of Disney to allow her so much freedom with what was at the time their most popular animated musical.
As far as a Little Night Music goes, it remains the only Sondheim musical to turn a profit on Broadway. It's a gem of a show. There was an article in the commemorative program from the Sondheim Celebration in DC. I can't remember who wrote it, someone like JRB or Lippa. He stated that he wasn't really ready for the show until he was in his mid-30's. Being in my mid-twenties, I find that I get more out of the show the older I get. That speaks volumes for a well constructed show with a fantastic score... like a fine wine, it gets better with age. Although my favorite Sondheim score remains Merrily We Roll Along, which I believe to be Sondheim's most melodic and energetic score (Sweeney has a lot of energy, but it's a melodrama)
Shorter runs in my book
The Producers
Rent (I saw it recently... Grief needs to get back in and re-tool it or it should close soon.)
Cats surely...
Les Miz was quite tired by the end of it's run.
that's all I can think of right now....
I wish the stage were as narrow as the wire of a tightrope dancer, so that no incompetent would dare step upon it. -Johann Wolfgang Von Goethe