I would actually recommend row 10 - very front row of economy lower deck - actually an exit row seat but I managed to get it on check-in despite not being an Elite Plus (only Silver - Elite). not sure if you can book it beforehand as I was only ticketed with less than 48hours to go so wasn't able to select a seat.

Also, when getting off the plane, they left first class go first and then economy from the lower deck.. and since there are 8 F passengers, you will be off the plane very quickly - very convenient for having to do c&i in JFK