When I'm shopping for movies I find myself debating on whether to just get the Blu-ray or get the Blu-ray DVD combination. Why should I buy the combination? My Blu-ray player plays them both. I always get the combination though because I still have a DVD player and if something goes wrong with my Blu-ray player I can still watch the movie on the DVD. A practical reason the case is the same size so it wouldn't be taking up anymore space than the Blu-ray. What is your preference?