I got my bump in performance by upgrading from a Jolida JD9A to an all-tube MAGI Phonomenal. Still using the AT150MLX. The Phonomenal isn't easy to find, however. That's not what you asked for and isn't much help (unless you find one), so ....
I've read good things about the wood-bodied Grado Reference (high output) and Statement (low output) cartridges working well with the Technics, especially if you start at least with the Sonata1, which is the most affordable of their wood bodies with a nude-mounted stylus.
The Zu/DL103 has a reputation for working well with the SL1200 as well.
I've read good things about the wood-bodied Grado Reference (high output) and Statement (low output) cartridges working well with the Technics, especially if you start at least with the Sonata1, which is the most affordable of their wood bodies with a nude-mounted stylus.
The Zu/DL103 has a reputation for working well with the SL1200 as well.