I have been using a Pete Riggle 12" SPU tonearm on my Thorens 124. for the last five years, I use it with three different SPU cartridges, and I really love what it gives me. A rich, full platform, superior when compared to both an old SME and a new Jelco. There are reviews with comparisons to some other contemporary tonearms. It uses a thread bearing and is adjustable in almost every parameter, most of the time on the fly.
It may be worth looking into: