Advice Needed Please



I have a Sony 1272 crt that will be ceiling mounted. My seating area will be 13-14 feet away from the screen.

Been thinking of either a 16:9 screen 120 inch, or a 62 x 83 cimeperm wall screen.

What would you use for that viewing distance? I'm leaning towards the 100 inch size.

Also it will be in a room that has a lot of windows, so I can't get it real dark during the day.

What screen material and gain would be best?

Been told Matte White at a 1.3 gain is great for the Sony 1272??

Thank You