After much experimentation I have come to the following conclusions about DTS and DD. DTS Normal dialogue is very clear. It also seems like background music is toned down a bit, which is also beneficial. However in action scenes and other high volume scenes the sound is very shrill to the point that it destracts from the movie. I don't like playing with the volume during a movie and I find myself breathing a sigh of relieve when the high pitched noise finally goes away. Even when someone raises their voice, it just seems a little too high pitched for me. Dolby Digital Dialogue is not as clear as with DTS. It could just be that the background noises are a little louder, which muffles the voices a bit. Don't know for sure. There is a little more bass than DTS. Action and other high volume scenes sound perfect to my ears. The shrill edge is not there, like it is with DTS. So while neither one is perfect, my wife and I greatly prefer Dolby Digital. I have tried and I just can't sit through an entire movie with DTS, it just dosen't sound right to me. Anyone else come to similar conclusions?