from personal expereince I can tell you that there is extra space at 40A-G...HJK however, does not have the extra space....i also caution you that you will be very near either a galley and lav, so there will be light and/or noise for a good portion of the flight. however, if the space is what matters most to you, I would say snagging those 40 A-G seats is your best bet.