I don't and will not own SACD or DVD-A. I'm strictly a two channel man when it comes to music reproduction and I like both CD and vinyl formats depending on the recording engineer.
That's too bad. Merely good multichannel can bring one closer to the music than the best two-channel. The best multichannel is simply sublime. Bad multichannel is, however, probably worse than bad 2-channel....
A few other suggestions, thus far unmentioned so far as I could see:
Blu-Ray:
Adele, "Live at Royal Albert Hall"
DVD-A:
R.E.M. - Green, Out of Time, and Automatic for the People
Beck, "Sea Change"
Queen, "A Night at the Opera"
SACD:
DSOTM
CD:
Radiohead, all
Natalie Merchant, "Tigerlily" (Mo-Fi)
Everything But the Girl, "Acoustic"
The Who, "Quadrophenia" (Mo-Fi)
Yuri Temirkanov conducting the St. Petersburg Philharmonic through Shostakovich 7
John Elliot Gardiner conducting the Philharmonia through Holst's "The Planets" and Percy Grainger's "The Warriors"
Tokyo Kosei wind orchestra, "Year of the Dragon"
Bela Fleck and the Flecktones, "Live Art"