I currently have a 2 channel stereo, with good bookshelves providing my sound. I use my stereo to listen to CDs, line out my TV audio, as well as the audio for DVDS or whatnot. I was considering adding a pair of front towers, rotating the bookshelves to back, and picking up a 5.1 or 7.1 or whatever receiver, adding more speakers later. But then, I remembered that I thought someone told me once that the next speaker to add to a 2 speaker setup was a center channel, particularly if you do your tv audio through your stereo. Before I move forward on anything, I wanted to see what he opinion of some experts was. This sounds like a reasonable idea, since the voices/etc are always on the center channel. But maybe it doesn't make sense, since my receiver is 2 channel, and probably doesn't route voices in that way? It would be cool if the next logical thing to add was also the cheapest (1 center channel).