Stacy and Clinton from TLC “What Not to Wear” has Hawaiian shirts on their list. However, when in the islands, do as the islanders do. I suggest owning at least one. (I have over 10.) Truly, they are very comfortable.
Ladies and gentlemen, wearing matching shirts out and about is too much of a good thing. Matching Aloha shirts says tourist faster than being seen in jeans and tennis shoes.

Aloha Shirts
Hilo Hattie has a great choice of fabrics and sizes. I also recommend the Bishop Street brand carried by Wal-Mart $18-20.

More Hawaiian shirts
FYI: The Aloha Shirt Museum and Boutique is located at the Shops at Wailea.