The RF-52s will be plenty for a room that size as long as they will fit! Also, if it is possible, you should definitely try to add a center speaker to your 2.1 system for movie watching because 70+% of the vocals come out of the center. The RC-52 is what matches the RF-52s. As for the subwoofer, the RF-52s do produce bass but they won't make the walls shake when you are watching a movie. It all depends on what you like, but I would definitely recommend purchasing a subwoofer.