I guess my system would be considered 3.1, though not in the formal Dolby Pro-Logic sense. I created a center-channel by blending the left and right channels into a third speaker (a Von Schweikert VR-1, now driven by a Quicksilver Audio Mini-Mono tube amp), so everything's analog. Satisfying nevertheless…

so what are your mains, vr4's? nice speakers!

Nope, but don't I wish I could afford those? The mains are NHT Classic Threes. Only enough room around here for bookshelves. It's a good blend, better than the NHT plus Totem Acoustic Mite combo I was using until this past spring. I piece things together on the cheap.