we went to Secrets Maroma Beach in Playa del Carmen. about $3500 in 2011, but I know it's more now bc I was looking at going back.
we also went to Le Blanc Spa Resort in Cancun, which was awesome. about $3600 for the week, but again, prices have gone up.
they were both fantastic and I would go back to either one. We are going to Iberostar Grand Bavaro in Punta cana next year for a change of scenery, which is going to be $4800 for 6 nights with an ocean view room.