Hi. Tough choices. If it were me, I'd choice #4 or #5.
For choice #6: As you probably know, root canals are always infected (even though the infection cannot be seen on x-ray but could be seen on 3d CAT Scan or Cavitat scan). There are many good books on root canals and toxicity, but you can also see the presentation by Dr. Boyd Haley to the IAOMT conference. Watch 1st 5 minutes and then from 38:50 onwards: https://www.youtube.com/watch?v=hoiYYzCuHOA
For choice #1: Dr. Huggins had always said that implants will always eventually cause an autoimmune response. So, I choice to avoid them. Also, Zirconia dental materials can have aluminum oxide in them and I chose to go the non-metal route since I believe metals in the mouth can cause lots of health problems over time. You may want to see some of the dental material-related videos by Simon King: https://www.youtube.com/user/siking1962/videos
If it were me, I'd get the book by Dr. Douglas Cook, "Rescued by my dentist" to read up on dental materials. If you really want to know what's in the dental materials, you have to look at the MSDS sheet (not the ingredients list).
The find a holistic or biological dentist, preferably someone familiar with Dr. Cook's work and procedures.