So i am just now getting back with answer to you questions
Electrical: Well i hope so i am currently renting
Light Control: Well i will be able to control 90% of the light
Ambient light : Well i have thought about that , I may have some behind the tv and inside the new entertainment cabinet i just built. I have thought about having a Philip tv like system, but not sure yet.
Entertain: yea i would say so sometimes
Picture and Audio quality: Can i have both
Family room and home theater combined
budget: 2000 or so. Already have TV, Entertainment stand, some mid range electronics