As you can see from responses it is a personal decision based entirely on how you use the TV, how much you use it and the precendence it takes in terms of you and your partner/family/friends etc.
We turn the TV off at the drop of a hat if someone is being disturbed/distracted by it. Someone may want the radio on, or music, or be playing cards, reading, talking etc etc so TV is very much bottom on the 'pecking order' hence we only have a need for an 'occasional' TV. We simply don't watch it as a family and I am happy to watch a DVD at the back of the room with my headphones plugged in.
You must prioritise for yourself based on technical requirements, distance, room layout how much you use it, social/family requirements, budget etc.