Hi, Ian
Oxford Ancestors claim to be the first company to use DNA for genealogy.
I can’t comment on any other company but I was quite satisfied with the results from Oxford Ancestors, which demonstrated that my family did not have the same origins as the Kay/Kayes in Lancashire and Yorkshire. Subsequent research in the IoM shows I have Manx roots.
I agree that cheaper testing may be around the corner. It is cheaper to test as a group but it could take quite a while to get fifty or so people to test together.
Bill Kaye