Ethan I was originally concerned about space with a 100" screen and not having room for speakers on either side of the screen,
I am considering using a projector instead of a television for that wall as I really wanted the larger screen size and don't want to spend 10k on a 90 inch tv :P
I think I could fit front floor standers with a 92 inch screen which would eliminate the issue of having the speakers to low.
CRN, I hear what you are saying about the non controlled lighting...do you think with a bright living room style projector that it would be ok? if not what if I had curtains to cover the arched window up top? I do most of my movie watching at night anyways. I mainly would be using this for watching movies and playing games and possibly as a computer screen.
I do appreciate a good picture quality (E.G. a panasonic plasma) but I think that since my viewing distance is quite far (12.5 feet) that a bigger screen would make more of a difference and be a much more immersive and "WOW" experience.
Never having owned a projector before I am really not sure how effected by light they are but I did demo one in the store with the lights on and the picture looked fine to me.