Jules,
Condolences on your condition, but welcome!
While the European doctors seem to be more experienced in multi-level ADR, many US surgeons have a lot of multi-level experience as well. I can recall only one other poster on this site that underwent ADR with Dr Lauryssen. If you want to PM him about his experience, his handle was nornie73. Dr Lauryssen seems to have a very good reputation. I know of one poster on this site, steve55 that had a three level cervical ADR with Dr Bertagnoli; they were the same levels you're needing.
Here is a link to his outcome.
Welcome and good luck, Jeff