Please forgive me as I am recent defector from US, and not up to speed on all of DL’s configurations. On DL 757 (Vers. 2) I am looking at SeatGuru, and they show no row 19 A-B-C, but don't list Row 20 A-B-C as a good seats. Is there a close bulkhead in this row (20)? Or is it wide open? Conversely, they show exit row 20 D-E-F as yellow, but with extra leg room. As I said, I am used to US, and prefer a row that I can have a window seat, and still get up without bothering those next to me. Any input on which of these two rows is better for that? Thanks...