While I agree with the others that you should wear what you want to wear, I don't think you should let other pictures persuade you to do something different than what you had planned. This will be my second wedding too, so I'm sure you too understand that a marriage is not about the wedding day. I chose a destination wedding for this specific reason! What I mean is that the rest of your life with your best friend is not going to change whether you wear a beach dress or a formal wedding dress. Yes, it's your day and you should feel special, but my advice would be to not get too caught up in the specifics of the wedding. It is just the first day of the rest of your lives together and what you wear for an hour will make no difference 5 years from now! I hope that is not too cynical, but I learned alot from my first marriage/wedding. Most of the details of that one particular day will be forgotten in less than a year!
Good luck in your search and I'm sure you will love your destination wedding no matter what!