Grand Palladium Colonial Resort & Spa
DH & I would definitely recommend the Grand Palladium in Riviera Maya, we went in November with both sets of our parents, and everyone had a great time. The resort is a family resort, but it wasn't overrun with kids, the beach is amazing and the choice of restaurants entertainment at the hotel was fabulous.
The Royal Suites Yucatán by Palladium
The Royal Suites is on the same complex, but it is adults only, a little bit more of a boutique resort, we took a tour around in our first week and its gorgeous, definitely worth the extra dollar if you can afford it!
Just down the road from Playa del Carmen (about 20 mins) one way, and in the other direction Tulum ruins (well worth a visit the history is good but the beach is phenomenal - about 15 mins)