I went with a standard 4:3 aspect because I do watch TV and I did not want vertical letterbox lines on the sides of normal broadcast TV. The other solution would be to run the TV in widescreen mode and it will stretch the image to fit but it also distorts the image which is not acceptable to me. My theory was that if I went with a large enough 4:3 TV I would still have a larger viewing area when watching 16:9 DVD's than if I just bought a 50 something inch theaterwide screen. And I was correct, my mothers fiance bought a Pioneer HDTV Theaterwide 50 something inch (54 I beleive) and my 61" has far more viewable space even when watching a 16:9 than his theaterwide has.
If you watch as much TV as you do DVD's I say just go with a 60-70" Digital or HDTV 4:3 and you will be happy with that. If space is a concern the Theaterwide models are half the height of a large 4:3.. My 61" stands a good 5.75 to 6' tall where as the theaterwides may be 4 to 4.5' tall.