Congratulations !!! The first thought I have is an area on the East Side. The spot has this beautiful rather large rock/coral outcropping. The water splashes around and through the formation. Unfortunately, I really can't give you an exact location, however if you just drive along the East coast, you will most likely find this and many other beautiful spots.
My second thought is to have some sunrise shots. Michael and I made a journey over to the East side to the beach at Mezcalito's to celebrate our wedding anniversary last year. We set up our camera on auto for some excellent photo shots. Our "Sunrise on Mexico" experience will forever hold a very special place in our hearts. Just be prepared for the policia to be present. We encountered some police walking on the beach as well as a patrol that parked at Mescalito's for a short time. I have also heard there are road blocks at times, however we did not encounter this. If we had come up to a road block, we would have turned around...no worries.
I also think perhaps some shots in and around the plaza would be neat too.
Best Wishes and Have a wonderful time !!