Given you have a budget. We dove the Kona Aggressor and did day boat dives on Grand Cayman and Utila. The Kona Aggressor is great; the diving is all about the unique fish in Hawaii. There are no soft corals or big schools (Typically) it is more about individual species you wont see in the Carib. You may see A shark and A manta ray while diving but not guaranteed. The Aggressor does do the Manta Ray night dive at the end of the week were you usually see 3-9 Mantas. Here is our trip report:
http://www.scubaboard.com/showthread.php?t=87779&highlight=the+small
Utila is also wonderful. Here you will have lush reefs, great macro and schools of the more common carib fish. If you go the right time of year this is one of the main Whale Shark areas in the world. Like Hawaii you may see a shark or manta but rare. Dont remember any wrecks in Utila but I am sure there are some small ones. Trip report for Utila.
http://www.scubaboard.com/showthread.php?t=66281&highlight=Utila+lodge
Caymans is all about big walls and deep drops. I love to sit at the edge of a big wall and watch the world swim buy. Shares most of the corals and fish you would see in Utila but a little more likely to see sharks, rays and wrecks here. We did not find the corals to be as plentiful as Utila. Once again we did Utila and Cayman from shore ops. Sorry did not do one for the Caymans.
For me it would be between Utila and Hawaii and would probably go with Utila
http://www.scubaboard.com/showthread.php?t=87779&highlight=the+small
Utila is also wonderful. Here you will have lush reefs, great macro and schools of the more common carib fish. If you go the right time of year this is one of the main Whale Shark areas in the world. Like Hawaii you may see a shark or manta but rare. Dont remember any wrecks in Utila but I am sure there are some small ones. Trip report for Utila.
http://www.scubaboard.com/showthread.php?t=66281&highlight=Utila+lodge
Caymans is all about big walls and deep drops. I love to sit at the edge of a big wall and watch the world swim buy. Shares most of the corals and fish you would see in Utila but a little more likely to see sharks, rays and wrecks here. We did not find the corals to be as plentiful as Utila. Once again we did Utila and Cayman from shore ops. Sorry did not do one for the Caymans.
For me it would be between Utila and Hawaii and would probably go with Utila