Cabins 3180 to 3202 will be quiter. They are on a hard to find coridor until you know its there so not much footfall. Cabins after 3180 to 3126, the middle bit, have a design fault that could not be fixed until a dry dock refit, it sounded like a dishwasher was in our cabin when the ship was at sea. We were offered a move as I could not sleep but my DH was not going higher up the ship. Luckily sunbeds are comfortable to sleep on!
I would definatly book 3180 on the Edge if I could afford it.