I'd rather keep a DVD Player. Blu-Ray, though the only good thing is the protective layer on the disc for scratching preventions, is just a next-gen DVD, which DVD itself can still handle what the Blu-Ray can do. You can still get the same quality and all from a DVD, which Blu-Ray can do, too. All of the movies that are released for Blu-Ray are slightly much more expensive than its DVD version.
I would stick with the DVD.