If you plan on sitting more than 9' from the set or want multiple rows of seating you'll want a screen bigger than 82" diagonal. Probably much bigger.
Beyond 13' even a 120" diagonal 16:9 screen is going to start getting small. I'd consider it too small for home theater use beyond 17' and marginal well before that.
Attempting to get 120" diagonal at both 4:3 (96x72") and 16:9 (105x59") will be difficult and either produce a 4:3 image that's too big or wide screen images that are too small. A 59" high screen screen is a better idea (4:3 will be 79x59 for 98" diagonal) assuming 105" is the appropriate width for you (people's sensitivity to source/projection artifacts varies), your projector (which determines the sorts of projection artifacts you'll have), and your seating distance.
You really need to start playing with projectors and seeing what subtended fields of vision work for you.
Beyond 13' even a 120" diagonal 16:9 screen is going to start getting small. I'd consider it too small for home theater use beyond 17' and marginal well before that.
Attempting to get 120" diagonal at both 4:3 (96x72") and 16:9 (105x59") will be difficult and either produce a 4:3 image that's too big or wide screen images that are too small. A 59" high screen screen is a better idea (4:3 will be 79x59 for 98" diagonal) assuming 105" is the appropriate width for you (people's sensitivity to source/projection artifacts varies), your projector (which determines the sorts of projection artifacts you'll have), and your seating distance.
You really need to start playing with projectors and seeing what subtended fields of vision work for you.