The SACD track is not readable by a normal CD player. It's a second layer, and the hardware to read it is different (more like a DVD player than a CD player is).
Anyway, there's no such thing as an SACD reader for PC's, currently.
Also note that SACD's can have a normal CD layer for compatibility, and you'll be able to read that just fine, if it exists on the disc. However, there's nothing that requires the disc to have that layer, and many of Sony's SACD discs do not have it.
My suggestion: eschew the SACD format entirely. Go with DVD-A if you must switch to something with high resolution. DVD-A *can* be read by many computer DVD drives.