Lol, when talking about projectors, by light control, we much will the room be reflective. Rooms with bright walls, floors, and ceilings will hurt the black levels and contrast on a white screen, and you will need to get a gray screen and a more powerful projector to compensate. Try to get the room as dark as possible for the best picture. Also, the closer you can get the projector to the picture, the brighter you can get the picture. This can be especially beneficial with 3D.
With regard to audio equipment recommendations, learn about Dolby Home Atmos, and decide if you want to setup that kind of system. Now is the time to make that decision since Atmos wants in-ceiling speakers, the installation of which should be determined in the planning phase.