I agree mirrors are definitely a necessity for safety purposes. Mark is right on, shorter stems would definitely streamline them a little bit more into the lines of the handlebars and the bike. I recently switched out to some aftermarket mirrors/stems that are lower and more streamlined. I can't see as much out of them as I could with the stockers, but they function well enough and are a big improvement on looks. I use my mirrors a good bit, but not any more than I turn my head to look (which is every time I change lanes or get ready to make a turn).
I'm not sure on the laws in Puerto Rico, but I would think that most U.S. states require you to have at least one on a "street-legal" bike.