Got a 150"-ish screen integrated in the wall, with a full HD projector projecting an inverted image from a "machine room" behind the wall, thus making it correct. The speakers are also integrated in the wall. Sound system worth about $10,000. Result of a home project for the basemant.

This.will.be.epic.
Edit: Concerning that whole scene-point, I totally agree, and it's a valid point. Bigger screen does not equal better. I just solve it by moving further back.

Edit 2: My regular tv upstairs is just a 37" hd-ready samsung tv, so.. Obvious choice is obvious.