I haven't been on a 380 but I've been on an older 747, and even in the back, in the middle of a row of seats, it was by far the most comfortable experience I've had in a plane. Cushy seats, enough legroom, and a very smooth flight. I agree with you about the noisyness of the 777; crossing the Pacific in one, compared to a 747, is a night-and-day difference, although that was in a much newer 777.