I had a 5.1 dolby digital receiver. I just upgraded to a reciever that does both dolby 5.1 & DTS. I also upgraded my rear speakers. Just curious what people think is a good dvd to get the good DTS experience and what would really give the rears a work out? One good one I have found for the rear speakers is the Patriot. The scene where Mel ambushes the caravan holding his son. Thanks!