Walker,
I've heard SACD two or three times now on good systems, albeit not ones I was familiar with (Genesis 1.1s, Classe Omega, Krell preamp & B&W speakers, Levinson electronics [forget the model numbers, but it was the biggest stereo amp, second biggest speakers], another more humble system, the top of the line Sony player in all instances). No chance to A-B original vinyl against SACD. My initial impression in each circumstance was good, but I'll have to reserve judgement until I can hear things under better conditions, and compare to vinyl.
Grey