I sat in Mezzanine Row M last year for Jersey Boys. I was worried it would be too far back before I went, but it was a pretty good view. Did I think they were normally $150 seats (they were the Broadway week for $77) no, but I still enjoyed it and was able to see everything fine. I would take the mezzanine over row x in the orchestra because those will be obstructed from the overhang and a lot happens on the second level of the set. Trust me, you'll be fine in mezzanine Row N.