Hello. I am flying on a 737-900 trans con. I can take exit row 17D or premium 9D. I don't drink alcohol. What would be better? I am leaning towards exit row so I am closer to the lavatory for such a long flight but wondered if I might have a better chance of having the middle seat empty in premium than exit row. I am number 6 on the upgrade list but there are only 4 seats available in first. Thoughts?