Imo, I've sat in mid right orchestra, 2nd row orchestra at Pierre's perch, and then absolute mid center orchestra and I've been very happy each time; you can see both staircases, I know I miss the balcony chorus line along the banquettes, and actually, I think being on stage, you may be close to certain performers, but you see the backs of the heads of mostly everyone as they sing. I honestly think I could sit anywhere and see something new and different at each performance; it's just that immersive. We're trying to get tix again and may go for upstairs this time. You'll have excitement wherever you decide. 
I Can Has Cheezburger With This?