Hi, Robin, and welcome to ScubaBoard!
I see we're both up late. Or at least I am, here on the Pacific coast . . . if you fill out your profile (User CP button), you can tell us where you're from, what you're up to, that sort of thing.
I'm finding SB (acronyms are everywhere here on SB) quite the habit-forming experience, and a great source of new ideas.
I recommend that you search the relevant forum in the Destinations category for suggestions and impressions of the islands you have in mind. Have a great time! I'm jealous already.
-Bryan