Dave,
I have "Waltz" on both SACD and 180g vinyl. From a strictly 2 channel playback perspective, I feel the SACD does justice to the format. It's a damn sight more "analogish" on the SACD layer. I've compared both the Redbook layer upsampled and the SACD layer, and the SACD is very good. I still prefer the vinyl on my system. YMMV, as I don't have the ultimate in CD/SACD playback (Music Hall Maverick), but I like what I hear so far, after about 50 hours or so on the machine.