I was wondering if I could get a little input

I am going on a soutern carribean cruise and want to dive at only one stop. Which would be the best choice????

St thomas
st maarten
antigua
st lucia
barbados

Any thoughts would be greatly appreciated !

St.Vincent. Next time please just visit the islands and skip the cruise. They are not really serving the customer or the islands. They only go to stops that have kick-back supported stores and shopping. They waste thousands of gallons a day of diesel fuel going no-ware and actually pollute the oceans more than they protect them. The normal stops have been over-populated and polluted so that many reefs around Mexico, Antigua, St. Thomas, St.Martin, and more are declining at alarming rates. If you want to go diving for real plan a trip to the southern Caribbean. Stay in St.Vincent and explore Horseshoe reef. Good luck.

I admit that the previous post has a VERY good point. Of your stops mentioned though, probably St Lucia. They have a good program for cruise ships. Antigua has the good diving on the opposite side of the island to the cruise ship docks.
Try Scuba Steve's in St Lucia.