If you want to go AI and want to be close to Playa then I would suggest something in Playacar that has not suffered beach erosion. Those would
Riu Palace (more couples oriented)
Riu Tequila (Across the street from the beach but less $$$)
Riu Yucatan (may be closed for renovations so check dates)
Gala (nice but family oreinted with lots of kids)
If you don't necessarily care if you're further from PDC it's no secret that my favorite is Palladium. Long beautiful, varied beach, lots of different bars with entertainment, two adults only pools, One huge lake like pool, vendors come in three nights a week, close to Tulum , Puerto Aventuas, etc. About 20 mins to Playa del Carmen.
Good luck in your decision.