My elderly father in law is partially deaf. His current Sony 42" plasma tv (approx 5 years old) has a headphone jack that will output to his headset without cutting sound to the tv speakers and has an independent volume control. This is an important function as it allows him and his wife to listen comfortably. He wants to replace his tv but wants to find a current 50" model with the same capability. Can anyone give me some suggestions? Alternatively is there some sort of converter that can do this maybe through the optical connection?