I have the glass lenses, and haven't regretted them! I haven't been on the water with them yet in the BVI. Just the Santa Rosa Beach area in the Florida Gulf. If you want the best lenses for the water, I would go with the mirrored lenses. I don't think you'll be disappointed. The gray lenses are better than any other sunglasses I've had, so you won't go wrong if you choose to go that route, either. A fun problem to have!