well, i don't have anything in both dvd-a and sacd so i can't compare the two...however, i do find myself listening to the sacd stuff that i've bought a lot more. my favorite is the Aliso Kraus and Union Station Live double disc. it's the best live recording i've ever heard. i also have a great SACD of Handel's Water Music and Music for the Royal Fireworks in 5 channel SACD!! DSOTM is pretty nice as well.
also have not done any 24/96 v. 192 comps. i have the dvd-a of REM's Document which is remastered in 24/192...sounds pretty good, but i don't think a remaster of a 15 to 20 year old album is gonna really bring out the subtle differences.
the other thing i've noticed is that the record companies are releasing really weird stuff in hi-res audio...like the Top Gun soundtrack (wow, 24/96 Kenny loggins!!!) and Blue Oyster Cult....wtf?
-damon