I second or third the comment to wait and see! Mirrored or shaded are usually frowned upon with the logic being that you should to be able to see the eyes of the person you are working with. That way you know if they are seeing the hazard as you do, or if they are looking away and are distracted.
Choose your glasses carefully. We ran into a major problem at championships in April with our glasses. They had a slight gold sheen to them which was to reduce the glare off of the plexiglas field divider, and the safety advisors (after we wore them at two regionals) determined that they were not clear enough. The fun part was the when we went to buy new glasses at the FIRST store on site, they were selling the same ones we were wearing.
