Screen Help

[DIGITALBATH]

Hello Everyone!-

I am trying to figure out a suitable screen for an optoma HD3300, a 1080p 3D projector. My room is 12 feet wide, 8 feet high and 16 feet deep, with white walls, and ambient light.

I also have a TV, so a manual or electric pull-down should be the best option this go around. I would like to be at $500 or less, 106-120".

There is so much conflicting information, but I am thinking 1.1-1.5 gain matte white screen to enhance the 3D, though I would like to get optimal contrast, though I know some compromises must be met.