I got there around 6:30 for an 8:00 show as well (after doing Hair lottery and losing) and ended up getting front row on the aisle. I think you'll be ok no matter what time you get there.
"This table, he is over one hundred years old. If I could, I would take an old gramophone needle and run it along the surface of the wood. To hear the music of the voices. All that was said." - Doug Wright, I Am My Own Wife