Cavern Diving Playa Del Carmen area

[AandA]

My wife and I are headed down to Cozumel in April  ;D ;D.  We plan to do the majority of diving on/from the island using the same dive shop we have in the past.   While we're down there we are hoping to spend a day on the mainland (get to the mainland by the ferry to Playa del Carmen) and experience a couple of cenote dives.  We would be quite interested in any recommendations as to what dive outfit to go through for cenote diving.