Believe me, the worst cabins on ships in regards to noise are the ones just below the children's activity centers--or right next to them.
We've had great luck with GTY rooms in the past, but you can always request a cabin change if the noise proves unbearable. If one is available, you will probably get it.
Also, inside cabins on the lowest deck and midship are subjected least to rocking in rough seas--though not immune. Your cabin assignment could be a blessing.