I think every SACD I own has a 2-channel mix. Not saying that every one will, but a good majority. There are also quite a few which only have the CD layer, and 2-channel on the SACD layer, no multi-channel at all. There are also some odd-balls which have 3-channel or quadraphonic mixes. Even a couple with 6-channel mixes, where what would normally be the sub-woofer channel is assigned a full-frequency mix, intended to be played from over-head.
But yeah, the ones I own have the CD layer, a 2-channel mix, and a 5-channel mix (don't know if most have a dedicated .1 or if it just the processor making that from the crossover point).
