Several cases will hold the DVX/M2 combo. So get a ruler, measure your camera, and go to pelican's website. They have dimensions for all cases. It depends what else you want to fit in the case.
Start a post called "So cases come in colors" for help with choosing a color, heh.
Storm cases are a lot cheaper and just as good as the Pelicans. If you want to look at a case that will hold EVERYTHING in your setup, DVX with rails and adapter, lenses, monitor, the Storm IM-2975 is a good deal.