I'll try and make this as short as possible. I recently lost my Yamaha DSP-A1 to lightning damage. But I have a Pioneer Elite VSX-26 THX receiver my brother gave me. With the Yamaha, I noticed slightly better surround sound performance when playing dts dvd's than DD dvd's. Not always but I could hear some differences. Now with the Pioneer Elite, I notice the opposite. In fact, it's more obvious. The Dolby Digital sounds more dynamic than before. Things like-more open, wider soundstage, deeper bass, are better in Dolby Digital using the Pioneer. When the dts is selected dialogue doesn't sound as natural or open. And the bass is less. Has anyone experienced this? I should note that with the Yamaha the dts and DD differences were minimal but they were there. It's not a huge deal as I'm getting tremendous sound. I'm guessing that Pioneer uses a better Dolby decoder in their unit? My rig: Pioneer Elite VSX-26 THX Reciever Pioneer 414 DVD player NHT VS-2's LCR NHT VS-2's rear Velodyne ULD-18 sub Thanks.