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