The best years for Dom Perignon are generally considered to be the early 2000s. However, some people believe that the 2004 vintage is the best one yet. Of course, this is all subjective, and everyone has their own opinion on this matter. But as a general rule, Dom Perignon tends to be at its peak a few years after it's released, so if you can get your hands on a bottle from the early 2000s, you're in for a treat!