Ubertrout, from the way your post is phrased, I'm wondering if you are a lawyer or have some actual expertise on these questions?
I had always assumed that personal copying was fair use of a disc that I had legally purchased. Also, there are some record/CD stores still in existence in the US (although many fewer than there once were), so I am assuming there is nothing illegal about selling used SACDs, although maybe that is a gray area as well. I am not planning on selling pirated copies or distributing copies of my discs on the internet, which seems in a more common sense fashion to be obviously illegal. And as your post indicates, information about and software for copying SACDs is pretty widely available. Not to mention hardware than can be specifically used for the playback of the files from copied SACDs being sold by many companies.
At any event, I will probably rush home now and delete all my files so I am in compliance with the law. If there was a way for me to delete this entire thread I would, and if that can't be done, hopefully the mods will close it off from further posts.