I recently bought a Sony KDF-E55A20, and the recommended distance from a wall is 4". Just wondering if that is necessary or not? The TV is not encased in anything, so it seems like the ventilation would be adequate if it were up against the wall. I ask because I am transforming my bonus room into a theater and could use the extra 4" for viewing. The TV seems just a bit big for 8.5' viewing distance.