Well, take for example the BR of Nemesis compared to the dvd. I can tell that it's nicer then the dvd. My BR of it was part of the Stardate collection set, so that's why I have it. However, I would not have upgraded to BR from dvd (for that movie specifically) if I was buying the BR seperatly. If the same quality upgrade can be said for the dvds/BR's of Enterprise, I can settle for the dvds in this case.