We're headed to Cozumel in March as well. This will be our 6th trip there...we love it. We are also booked to dive with Blue XT Sea, as my hubby frequents the scuba board and followed Christy when she was on the island during Hurricane Wilma. We're excited to dive with her operation.
If you can possibly fit it in, definitely schedule a trip to the mainland to do a Cenotes dive. We dove Dos Ojos last year, and it was absolutely spectacular!! The water in the caverns was so clear, I had to remind myself...and quite often...that I was actually in water!! No kidding, you actually feel like you're flying through these beautiful caverns/caves. We're going back again at the end of this trip as well.
Lisa :fish1: