SRO for A Chorus Line is not bad -- fine sight lines. I can't remember how high the back wall of the orchestra section is at the Schoenfeld, but I don't think it's as bad as other theaters (Lunt-Fontanne, New Amsterdam). Just be aware that the show doesn't have an intermission, and it's 2 hrs. long, so standing is a bit more taxing than average.
If you can flash your Student ID, that's the way to go -- although it is a bit pricier than most student tickets -- the box office gives you the best of what's available. I sat Row H Center Orchestra last time with student tix.
<---- You can see the crazy in her eyes. ;-)