I own a year and a half old Sony KP-61V80 (61") TV. While my picture is good, I notice a halo effect in dark scenes of DVD movies. Even more distracting is the glare lines that come from smaller brighter objects in dark scenes. Does this make sense? They are almost like light rays being omitted from bighter objects. What can I do to reduce these? My TV has been carefully adjusted with Avia. Is an ISF the answer?