I have a nice, high end, two channel stereo. I have neither the space nor the inclination to expand into home theater at this time. My TV sits in between my speakers (like I said....not much space). I note that DVD's can offer a choice of audio formats. For example, my latest Grateful Dead DVD, Dead Ahead, offers "Dolby Stereo" and "Dolby Digital 5.1." Other DVD's, whether music videos or just plain old movies, offer similiar choices, if named slightly different. I always prefer the 5.1, even though I am playing it through a two channel system with no decoding. What exactly am I listening too? What format is preferred when listening to a DVD through a two-channel system?