I dove Grand Caymans last year, East End Diving with Ocean Frontiers. It is definitely a place I want to visit again and again. Sharks, turtles, sea horses, etc. etc.
So far the Caymans has proved to be my favorite diving destination. We rented a convertable and toured the island during our surface intervals. We stayed in the condos at Ocean Frontiers, and shopped for food and cooked at our leisure. Everything was very comfortable and well worth the expense.