Typically, the higher the gain your screen is, the reduced viewing angle it will have. For the size of your room, needing a wide viewing angle is probably not a top priority. I would say go with that ...

Now Shipping, the 0.8 Gain ALR Screens Have a 170 Degree Viewing Angle; Ideal for Situations Where High Ambient Light May Otherwise Interfere with Proper High Performance Viewing Abilities San Tan ...

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There is a downside to these, though. Such presets emphasize brightness while sacrificing color accuracy, resulting in an ...