Although no longer in production, I am pretty happy with my Ortofon OM 30 Super. The OM line, like the current Ortofon 2M series, is a cool upgrade path, since you upgrade by swapping in better styli. I went from the OM 10 to the OM 30, and the difference was huge - much smoother highs, better tracking (tracks almost anything), better separation and more extended, smoother bass. Starting with a Red or Blue, you can eventually upgrade to the Black, which seems to have a lot of fans. So, yes, to answer your question, there are noticeable improvements as you move up the Ortofon MM stylus line.