I don't know how high it is, but it's very tall and the set makes full use of the height.
I definitely agree to go with the mezz. Great way to see this show. And as contini said, the overhang is so much that mezz A is actually much closer to the stage than at most theaters.
It's true, you may not see the keyboardist and other SR action though.
If the audience could do better, they'd be up here on stage and I'd be out there watching them. - Ethel Merman