I think for audio protection, the difficulty lies mainly in the reader, not the writer. If your reader can create an image file, then just about any decent writer should be able to write the resulting image onto a disk. The CDS and K2A protections are designed to confuse the CDRom/CDRW/DVD readers in computers.
From what I’ve heard, few readers can deal with these protections. I hear that some of the Plextor drives might be able to read through the protection. I have also heard that the LiteOn 32x burner with the latest firmware may be able to read through the protection. Similarly, I have read that an AOpen drive could read through the protection. Bottom line is most computer drives cannot read through CDS and K2A protections. So, pick your drives carefully!
I would be happy to test some of these drives, I have a Plexi 40x SCSI reader on order, and I already have the Litey 32x burner. But I have no CDS or K2A protected original CDs. So far, the music I listen to has not been protected (yet).