Over the past 2 days, I saw the film Master & Commander: Far Side of the World twice on my Home Cinema system governed by my Onkyo 706. The first time I set the audio to Dolby Digital 5.1 and then to DTS. It seemed to me that while the surround effect was clearly better with the DTS setting, the dialogue felt slightly isolated; IMO the DD 5.1 setting gave a more balanced sound. I have compared DD 5.1 & DTS with my old Denon in the past and felt that the dialogue isolation under DTS was less obvious. Is this a particular phenomenon (i would not call it a 'problem' as such) with Onkyos? I have already increased the centre speaker bass manually; should I beef it up a bit more?