If it were me, I’d do Saba in a heartbeat.
It took us probably 25 to 30 years of annual visits before we ever made our first trip out there, and I can only ask self, “Self, why did you ever wait so Long?” No beaches to speak of but it’s Breath-takingly beautiful. Incredible photo ops and some excellent places to lunch though I would personally recommend the Queens Garden Inn. We loved it so much we chose to stay over for 3 or 4 nights and enjoy some serious limin’ time. There’s a very small museum, a very small hydroponic garden, the Saba Lace and Spice shop, a beautifully painted local church not to mention diving, snorkeling and hiking ops if they’re within your purview.
If you can’t do without a beach, Anguilla is lots more of the same beautiful beaches similar to SXM and STB.