Another thing to think about. Measure the distance between the location of the TV screen and the closest point you'll be sitting to watch. Then check TVs out at the store standing that far away. There's such a thing as being too close to a big screen. Back when the really big home TVs came out, I was shopping for the biggest I could find. The salesman sent me home to measure the distance between the closest chair and the location of the new TV. Then he moved a chair in the showroom closer than that and had me watch. Your eyes have to scan the screen and it actually creates eye strain.
Imagine sitting 40 feet away from one of the screens in Dallas cowboys stadium. Too close.