While in Aus I found a shop wth a few DVDAudio titles, since I didn't own any I decided to buy one to try out. The one I went for was the soundtrack to A.I. The disc contains both surround and stereo versions of the track. I don't have the video DVD and don't own any other DVD Audio titles to compare against. The surround version didn't sound quite right to me. I then listened to the stereo track, this was much better and miles better than CD playback from my setup. To me it really shows up the lack of quality in the source material that I had previously been used to in CDs and to some extent DVD video. I just need to figure out why the surround sound didn't quite work, I'll need to get a few more DVD-A's with both surround and stereo tracks to compare.