Thanks for sharing your experiences and ideas.
Dimensions are 13.8 ft x 22ft (for the main rectangular area).
Few things to mention:
1) I cannot project 'under' the soffit. If I do, then I am forced to bring the screen down below the sofft (obviously). In doing that, there is no way the rear row will be able to see, no matter how tall the riser. Right now, I would be projecting a few inches below the ceiling, and that allows rear row to see over the first row if I use a 6" riser. (Rear row is offset from the front, so this allows for a slightly lower riser than usual). 3+2 configuration.
2)103" at 15 ft is less than ideal, I agree. The riser will be heavy, but moveable. When I upgrade to a 1080, I will move everything closer. Not ideal, I know, and there are a lot of issues with this, but I think it is do-able.
3) I see what you're all saying about the AV rack on that location. And you're of course all correct. Too late to turn back now, so I will have to figure out ways to soundproof the back of it. I think putting a door on the rear of the cabinet would help a lot, but of course ventilation could be an issue.
Thanks for all the feedback. I know you all want me to build the best possible theatre I can. There are quite a few constraints that I needed to work around (space, time, money!) so I did the best I could with what I had, and the little knowledge I have accumulated on the subject by just reading the forums. I know the second time around (next house) I will do better!
The Moderno Theatre! Slideshow (here, and here!)Pixar screenplay slideshows here!