You used terms "DVD-A" and "SACD" in different sentences. Are they same in terms of multichannel? How are they different if any? Do they require multichannel components for sound effect?
Ddlpark...DVD-A and SACD are two formats of digital discs, neither of which will play on a regular CD player. Both formats provide for both Stereo and Multichannel playback. You need to have multichannel amplifier and five speakers.
Sony pushes SACD, and seems to have convinced a lot of audiophiles that their recording format provides greater fidelity. However, the very best sounding discs happen to be DVD-A., Go figure.
Give me my 2-channel SACD any day, it's just too bad that the better rock albums are all on DVD-A. Having listened to much of the best audio equipment in the entire world (Wilson Audio, Totem (the very high-end totems), Dynaudio etc.) I can honestly say that 2-channel music, especially in rock, sounds better than MC. I have heard some great MC rigs and have come away impressed but nothing compares to the wonderful pinpoint accuracy and deep soundstage that a really good 2-channel rig (especially on vinyl) can present. The MC rigs just don't sound natural (true I have not heard the recordings that you listed, but I live very close to Soundworks in DC who sells Wilson Audio gear to embassadors at full retail and has the best listening rooms on the East Coast and I have heard the discs they demo their equipment on) especially when instruments are playing behind my head. Fleetwood Mac's Rumors is one of the greatest albums of all time and on my Micro Seiki turntable it absolutely sounds perfect you can tell where every member of the band is standing and the soundstage is deep and wide as though you are in the studio with them watching them all play (not smack in the middle of them), on the MC DVD-A version the same effect is not there. The whole album sounds forced and while it might seem cool at first to have some nice rear fill, the longer you listen the more fake it sounds. That is my opinion and if I hear something that changes my mind I will admit it but as I own both a DVD-A and SACD player and have listened to many different rigs I just have yet to understand paying all the extra costs for a MC rig.