I have a flight coming up on an A320 and am wondering the best economy plus seats to go for? I took the first row isle as its closest to the front (7D), but I am wondering if row 21 may be better since its an exit row on the wing? Any advice would be appreciated? On my connecting flight I got upgraded to first as silver, but this second flight I'm third on the upgrade wait list, so I am not too optimistic.