We love to start our trips to Negril with a couple nights on the cliffs. It definitely is a different vibe but we love both the cliffs and the beach. There are so many great restaurants on the cliffs, and for us, there is nothing better than sitting on our balcony/patio in the evening with a Red Stripe or Appleton listening to the waves crash against the rocks. Since you have so many days on the beach, I'd definitely spend a few on the cliffs to try it out. Our last reach we stayed at Spa Retreat and loved it!