It's my understanding also the the "Living Stereo" releases are 3 channel releases as you stated. They are also supposed to be some of the better SACD releases out there.

If you have a multi-channel SACD set up, you really should go out there and get a copy of Pink Floyd "Dark Side of the Moon". Here's a link to the right version:

http://www.amazon.com/gp/product/B00008C...v=glance&n=5174

At the price, it's a must have demo. Enjoy!