Have you considered maybe staying up on the Cliffs instead? Idle Awhile has a sister property, Hide Awhile, located on the Cliffs, and it's much quieter up there at night. They also have a shuttle to bring you down to the beach during the daytime, so you still get the best of both worlds.

We also have been staying at Idle Awhile and love it there, and while the music doesn't bother us, I know that it can get kinda loud for some trying to get to sleep early. Thankfully even our little ones have slept right through it! I guess we are just loud at home and they are used to noise, haha! We haven't stayed at Hide Awhile yet, although we did go up there for drinks and a beautiful sunset, and it's very private and peaceful there. We have enjoyed staying on the cliffs when we travel without our kids and have loved our stays at the Rockhouse. We also stayed at The Caves once before, and as amazing and unique as that place was, there are other special places on the cliffs that are just as beautiful, but way less expensive!

Just like the beach hotels, there are so many awesome choices on the cliffs, and you can read through some of the recent trip reports to see some great photos. After reading Clarity and Markus' report, I know that I became totally sold on the breaktaking Villa Sur Mer!
But, whatever you choose, I am sure you wil no doubt have another fantastic time in Negril!:-)