Here is my dilemma. I want to backup my DVD's. I want the best video and sound quality. I don't like all that extra stuff, I just want to main material so I choose re-author. I want to be able to *loan* my backup to family so I want my backup to play on various DVD players of various quality. Here is where I have some questions.... I'd like to take just one sound track to preserve space for the video and reduce video compression, thus help the image quality. I sometimes see AC3 and DTS as choices. I want to choose just one. I like DTS and I'm willing to take up the extra space it needs. My understanding is that not all DVD players support DTS. Is this correct? Can DTS be used/substitued for DD 5.1 if some player does not have DTS compatibility? In other words will DTS alway be used by all players if it's the only sound track available on the disc? Should I always choose DD and not DTS? Should I always include both? I'd rather not so as to leave more room for Video. Comments? Thoughts? Questions?