Death Cab For Cutie - Transatlanticism (stereo SACD)
Grateful Dead - American Beauty (DVD-A) I think the surround mix is over-the-top but the stereo mix sounds superb
Pink Floyd - Dark Side Of The Moon (multi-channel SACD)
Rolling Stones - Beggars Banquet (stereo SACD)
REM - Document (DVD-A) I like both the stereo track (192 kHz/24-bit) and the surround mix on this one
Porcupine Tree - In Absentia (DVD-A) The stereo track is only 48 kHz/16-bit (although it still sounds good) but the reason to get this one is for the hi-rez 5.1 mix


...and...

not a hi-rez format but I highly recommend Super Furry Animals - Rings Around The World DVD. Its DTS mix is stellar. Easily as good as most of my SACD/DVD-As and music simply doesn't get any better to these ears. Think Beatles-esque sensibilities, hooks, vocal harmonies, and large scale productions mixed with Animals-era Pink Floyd-like ambiance and even a bit of techno here and there just to keep things interesting. Hell, McCartney himself even shows up on (at least) one of the songs ("Recepticle For The Respectable").