Look for SACD's that were originally recorded using DSD A/D converters, rather than transfers from analog masters. Although there are scientific/mathematical reasons why this is better (having to do with noise-shaping and dither in a 1-bit system), there is no question that they sound (to my ears) much better than other SACD's and really give you an idea of what SACD is all about. The only problem is that there are not too many SACD's recorded in this manner, but check out Yo Yo MA - Solo (not the Appalachian disc) on Sony and several discs on dMP (especially the Steve Davis Project and Far more Drums by the Robert Horner Percussion Ensemble).
