Originally Posted by Brian Fineberg
Can you elaborate? Thanks
If your intent is to project onto the 11' wide wall, and you are sitting about 15' away, then the proper size screen for that would be 10' for a 16:9 aspect ratio. That's not going to work really unless you go to in-wall speakers and an acoustically transparent screen, and that's for a 16:9 ratio, not a 2.35 ratio.
Now, if you intend to rotate the room and project onto the 16' wide wall, with viewing at 11' away. You have certainly could go wider. At 11' a 100" diagonal 16:9 image is typical and CIH from that distance would be 127" diagonal - but the Panasonic can't hit a 127" diagonal with only a 10' throw distance (lens to screen).
So, I would personally go for, and recommend the largest 16:9 screen that fits the 11' wall and allows for your speakers. There is no obvious reason whatsoever to go to the 2.35 aspect ratio in this room other than 'you want it'. Which, is up to you.
But, realistically, you have maybe a 9' wide screen you can use on the 11' wall, less 4" of screen border, so 8'4" wide - about 100". That puts your seating at 150" (12.5' eyes to screen) for a very comfortable 16:9 viewing experience with a 115" diagonal 16:9 screen.
If you were to go with a 120" diagonal 2.35 screen, that screen material would be 111" wide plus about 8" for screen borders so 119" (let's call it 120") which is 10' wide, which I expect to not allow you to get speakers to the left/right of the screen. Still, that only produces a 16:9 image which is 94" in diagonal. At THAT size your seating should be about 121" from the screen, or 10' away. That's pretty close considering your room size, and doesn't really work anyway because of the room width.
So, in your case, which is similar to the case of many others, you don't have the width to work with 2.35 properly, and when you rotate the room to have the width, you no longer have the depth to do 2.35 properly. So, I recommend a 16:9 screen. This way you can maximize your screen size on the 11' wall, and have no impact whatsoever on your 2.35 screen size.
It also makes some difference than there is no native 2.35 content really. Just 16:9 content which has black bars above/below it. Your best content comes in the 16:9 aspect ratio, so why not make the most of it in your room?