With my initial research, I decided to go with the product Holistore recommended by Dr. Douglas Cook. (http://www.dentistryhealth.com/) My second choice was Point 4 because it did not list BPA or BIGMA in the product safety sheet although it lists other toxic materials that I don't comprehend.
However, my dentist said that the company Den-Mat (who makes Holistore) makes poor materials that deteriorate quickly. He said that Point 4 is a good product but it seems that he doesn't use it often for some reason.
My dentist suggested Grandio SO and Admira and told me that these are the two products that he has found to be the safest with high biocompatibility (because I didn't want to do a biocompatibility test). I think they contain BIGMA in their safety sheets but my dentist told me that all composites contain BPA or BIGMA or something of that sort even if they do not list them.
I think that there is still merit in Holistore even though my dentist dismissed its manufacture. Its fragility may very well be due to its low toxicity, and I don't mind replacing fillings once every 7 years or so. But, because my dentist has no experience with the product, I thought I'd go with Grandio SO since he is very familiar with it.
I also bought a Hulda Clark Toothbrush Zappicator. I read that it can help harden the composite material and eliminate any BPA leakage. I hope it really works.