Installation a home theatre system is not a trivial exercise. There are so many important factors you need to take into account:
- where are the viewers going to be sitting? (everyone should have as much of the full experience as possible)
- what type of content will you use your home theatre for? (will it be sports, movies, of music?)
- what are the general acoustics of the room? (the sound inevitably gets distorted as it bounces off the walls and the pieces of furniture)
- what is the lighting setup? (windows / glass doors and well we lamps that may reflect in the TV screen and result in a less-than-ideal viewer experience)
As you can see here, installation of a home theatre system should be trusted to a TV installation expert with the right knowledge and experience.