I've had excellent results from the shirts I've bought at Shipwreck over the past 20 years. Still wearing most of them, under my sport coat when I teach a class on Caribbean Tourism. The students always ask to see the entire shirt. They usually have some new designs each year.
Also, I've bought many shirts and pants from the Carihola store on Front Street in P'burg. They are bamboo fiber and they do last. My very active and athletic grandson can't wear them out and he is now 16 and still wearing the earlier ones. You can also get them on-line. Warning they aren't cheap, but worth the initial money as they last.
Really depends on the type of shirts you want to take back and show off.