"tweak your system's levels, placement and eq and LISTEN."

And for me, therein lies the problem. My surrounds are fixed regards to distance. All this tweaking should be done in the digital domain, IMO. Until that's available SACD and DVD Audio are non starters for me.

As an aside, we already had multi-channel delivery systems (DD 5.1 and DTS). Why didn't these take off as audio only media, dispensing with the need for more formats?