I've sat in the golden circle at La Nouba and I had front row center seats at Kooza recently, both of which were great. I had to look up a bit for one wire show, but it pays off for me being able to see the characters up close and enjoy their facial expressions, costumes, and stage details without straining to see from halfway across the room.
I haven't done L'Experience, but I've done meet and greets with the cast before. It's cool but I don't know if it made the show more impressive. It's pretty much a self-guided chat with one of the performers and a look at costuming. I'd pass on it and just get good seats.