Go the the Wyndam Resort in Cozumel.  It is all inclusive including the bar and all meals, a decent property and the Silver Dollar Dive operation is on site.  They do an excellent job and your location (about a 15 minute taxi ride below the town of San Miguel) puts you in a short boat ride from the best dive walls on the Island such as Palancor.
I go to Cozumel pretty much every February and love the diving there.  I have dove in many remote locations worldwide and somehow end up back in Cozumel.  
Have fun,
Ken