Unsound, I understand that recommendation but based on that calculator my current 55" TV just a few feet away from seating position should be between 70" and 77".
Mounting above the fireplace, the recommended screen size is between 118" and 125".
According to Google, there are only a few flat screens that large and they start about $100,000.00. I know a front projector can go that large but won't work due to the large skylights I already mentioned
Do you know of something I'm missing?