Yes 51-52a/j are good because you get quite a big gap between your seat and the wall of the plane. I prefer 52 because you can stick you legs in the gap and gain some extra leg room, that is if the person in 51 hasn't piled up their hand luggage there. The only problem with these seats is that you are last off the plane and so last in the queues for immigration, also the galley is very close but not usually that noisy.