Yeah, choosing my photographer was ridiculously painstaking. I mean, when you have a local wedding you typically choose from the talent in your area (and don't even consider flying people in)... but when you have a destination wedding then you can choose from talent around the world and their prices are often cheaper! That's just crazy to me!! It was so many options!!!
So, figure out what you want from the portraits in the end. Find someone who will be able to deliver that, and if you have a connection with them and their work is great, book them.