I used to have a home cinema set up in the lounge of my house, about 10 years ago now, however, we were looking to move at one point and having a room full of Hi-Fi equipment does not really appeal to your average house buyer, they want to see white ceilings, magnolia walls, laminate flooring and loads of space. So I had to dismantle the cinema room set up and place it all in storage.
In the end we never did move, and 2 children and a loft conversion later, we have decided to convert the garage on the side of the house, primarily as an additional bedroom and utility room, but whilst we are living here it will be used as a cinema room.
This is the original proposed room layout as drawn up in Visio.