One piece televisions aren't big enough to provide a cinematic sense of impact beyond the shortest seating distances, especially when you limit yourself to flat screens priced less than nice german cars.
A 50" plasma is good out to 5-6' or 65" out to 6-7'. Once you get out to 10-11' you really want a 100" screen once you get used to thinking in terms of small movie screens (at 11', 100" diagonal gets you the subtended field of vision you'd have in the last row of a decent THX theater) instead of big TVs.
You really want to use front projection with some light control and a grey screen. If you must watch with high ambient light you can hide a flat panel for casual TV viewing behind a retractable screen for movies.
A 50" plasma is good out to 5-6' or 65" out to 6-7'. Once you get out to 10-11' you really want a 100" screen once you get used to thinking in terms of small movie screens (at 11', 100" diagonal gets you the subtended field of vision you'd have in the last row of a decent THX theater) instead of big TVs.
You really want to use front projection with some light control and a grey screen. If you must watch with high ambient light you can hide a flat panel for casual TV viewing behind a retractable screen for movies.