Adam, when was the last time you ever saw anyone regret going too big? I might've seen it happen once ever, not too sure.
I sit a few ft farther away than you do at 15ft, and my screen is larger than 75
square ft. And I probably experimented with viewing angle as much as anyone here. I've had a 10 yr Pana employee and a 10yr film director who just got inducted to the Director's Guild a few months ago, come over on multiple occassions. Greatest pic they've ever seen.
With
FULL-SCREEN 16:9, some numbers
at the closer distance of 10ft. (At 12 ft, you can be assured the numbers will significantly larger):
Your viewing angle = 20.6 degrees.
Using a 50" display:
To acheive THX recommendation (middle of theater), you need to scoot up to 5.6 ft.
To acheive SMPTE maximum recommended distance, you need to scoot up to 6.8 ft.
To acheive THX recommended maximum distance, you need to be at 7.9 ft.
Rather than 50" display, with set distance of 10ft (not 12!):
To acheive the
minimum SMPTE screen size, you need a 73.8" display.
To acheive THX
recommended screen size, you need a 89" display.
To acheive the same viewing angle that I have, but at 12 ft, you need a 106" display.
The above is with
FULL-SCREEN 16:9. Not to mention 1.85:1, 2.35:1, 2.40:1, etc.
I'm NOT saying that my preferences are the law, but am feeding you info to make sure its been considered. Food for thought.
Then that cool graph tRiXtA made, with 20/20 vision, you will not be able to detect the benefit of 1080p vs 720p, even at 10 ft, let alone 12ft.