one thing to be cautious of. Not all DVDs are mastered of equal quality. Some look great, some look like junk. Same can be said for Blu Ray. One of the first blu rays I saw was Superbad. I'm not sure if they were referring to the video quality or what but can say, I've seen properly done DVD look better.
All that being said, I'd check your settings.
Diplomacy is the art of saying hire a pro without actually saying hire a pro