SACD's native hirez output,DSD, is unrippable...copy protected very well, and the DSD output is proprietary. Now, some SACD players output to PCM or do so through an option, but this still doesn't mean one will ever live as a pc-based drive.
I know of someone who's pulled hirez data off of SACD (presumably PCM cuz it ended up lower rez 24/48....) onto a DVD-Audio disc, but assume that is a major kludge-fest.