Brighter also comes at the cost of contrast. And that projector is limited. I would get a white screen with as much gain as possible, and try to control the ambient light as much as possible. The reason that I mentioned DIY, is that you could paint a wall, or even try BOC (black out curtain) on a frame for less than $50 and get good results. I made a 10 foot wide fixed screen from laminate that is kid proof (can be cleaned with soap and water- beaded screens and some others are ruined if a kid puts a dirty hand on it) and works very well for less than $140.