Love St. Bart's, very French, very expensive, very nice restaurants & beaches.
Love Anguilla, beautiful beaches, laid back vibe, not as picturesque as St. Bart's, but relaxing for a great day on a gorgeous beach.
Never been to Nevis, but it's not easy to get to from St. Maarten. They do have flights to St. Kitts.
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The Friendly St.Martin Island Forum