[herniated C6-7]

A herniated and serverely degenerated cervical disc C6-7 seems to cause all my symptoms. In the past year, the disc immediately below C6-7 also began showing up as some 90% degenerated. But it does not appear to be causing any symptoms as yet.

My surgeon recommended replacing both discs with 2 Prodiscs. My insurance refused coverage.

Should I do surgery? Pay cash for replacement? In Germany? Which surgeon and artificial disc? One level or two? What is a good basis for making these decisions?