Hi Kathy-
I think you'll enjoy Utila. That said, given where you've recently spent alot of time diving, do adjust your expectations. There is no diving in the Caribbean that matches that of Indonesia and other areas of the Pacfic. Utila has great macro life and swimming with Whale Sharks is a great experience, but it is incomparable to the Pacific. We recently got back from Bali/Komodo and it was truly stunning. We love Utila and spend alot of time there so if we are biased at all, it is towards Utila, just don't want you being disappointed.
Have a great trip!