Here is the thing back in the day the HR100 S was good, but the SME 4 and 5 were in my opinion better tonearms. I remember it well and the other Alphason arms.... well they were ok, but the 100 was the best they did and sounded good on a Sonata, but off that the SME's in my view were better sounding. I know many folks disagree but I have a pretty good memory and it was an SME I wanted back then not a 100s. I did plenty of listening as well, I was one of the turntable builders and set up guys back then in a shop that sold all of those brands and more, so set them up multiple times.