After listening to the hi-res multi-channel tracks on a few of my DVD-As, I am almost tempted to exclaim I'd never go back to 2-ch CDs. But not so fast, I've likewise listened to the recent releases of the Sony DSD 1-bit encoded CDs and HDCD formats on CD and I must say, they max out the sonic potential of my system far better than their previous mixes of the same titles before.
I had Grover Washington's Winelight on LP, CD and now, DVD-A. I recently got hold of the Feel So Good album - a 2 disc compilation of jazz and R&B containing some selections from Winelight on HDCD and I must say, I have great difficulty discerning between this 2ch-CD and a DVD-A in hi-res stereo track.
I also got a compilation of Disco hits of the 70s and 80s, one in DSD bitstream and another in HDCD. I used to dance to these hits, but now, listening to them in their newest incarnation was a total revelation. I never thought you can listen to mindless disco music. But I found myself doing so. (Maybe disco music of the past had more intellectual content than disco hits of today

) In glorious 2 channel stereo CD. Even in 5-channel Stereo!!
It seems the newer re-issues of old CD titles on the same media were mixed anew using 20 or 24-bit remastering where the recording engineers did a most competent job. I always believed that a recording mix is a product of these engineers. The truly excellent ones being the product of recording engineers who did well. And whether they are in LP, CD, DVD-A or SACD, there are good and bad ones. While it is true the DVD-A and SACD are technically superior in terms of capturing a performance more faithfully, often it is the quality of the mixdown into 2 or 5 channels done my recording engieners that can make a difference. An over-zealous engineer doing a ping-pong between channels can ruin a stereo mix just as easily as a 5-channel mix when he pans an instrument across all channels as if the musician were running around the room while playing.
I probably won't have the compulsion to listen anymore to old CD titles for which I have a new remix of the same titles in multi channel DVD-A format. But because there are also new CD remixes in HDCD and DSD that can sound more gorgeous than their previous issues, i'd can't let go of 2-ch CDs.