Ah, "Cai the Fly Guy".... you keep talking about other forums, but, frankly, I don't really go to other forums (well, except AVS and DigitalHomeCanada, but they're different).
I still think you don't believe that I want this to be an open discussion without the ire you've obviously been subject to elsewhere.
I'm in a funny position, as I've outlined above - surround, when done well, rocks. Surround, when done in a strictly gratuitous, non-musical way (or is just pumped up using some unfolding process) does not necessarily, for me, make for a better recording. I am finding new life in my 2ch CDs now with Logic 7 - for example, Frankie Goes to Hollywood just rocks with Logic 7 - the SACD mix would have to be a new, descrete mix for me to beat it.
I agree that DVD-A is certainly in the lead in terms of features/multi chanel options, and I've mentioned elsewhere in this forum that I really can't hear the difference between the SACD of Synchronicity and the Remastered CD from way back (this through Senheisser monitor headphones, literally no tonal or colouration differerences... same mix, same sound... ). On the other hand, stereo releases like the Stones discs do seem to shine more in their SACD version, but I'm not convinced this is because the SACD layer is better, it just might be mastered differently (you see this all the time with DD/DTS differences, where, for example, Spielberg movies pump up LFE and rear surrounds so the DTS "sounds" better by being louder...)
I think 5.1 Entertainment got it right - the difference is certainly more evident with added features and multi-chanel mixes than it is simply with a hi-res treatment, particularly for more contemporary digital recordings. I'm all for SACDs that are stereo only that go to the trouble of presenting a really beautiful remastering of a classic analogue disc. I'm not convinced, however, that, say, the new PG discs (like So, for example) will necessarily shine on the new format any more than they do on CD.
No SACD, however, can top what Rumours DVD-A brings to the table. Sure it can't be played in a car (well, not many cars), but the added features (especially comentary track) simply take the music to a new level. Owning that disc makes you love the album more. And that, whatever format it comes out on, is what may drive these hi-rez discs off the shelves.
Any other discs that come close to Rumours in terms of quality of extras? The EPK for Buena Vista's pretty cool... The booklet for DSOTM is very nice as well (though a different beast, good packaging is certainly important).