I do not have direct experience with the Accuphase AD-50 phono, so my comments come from general experience:
I would hesitate to jump into a 0.2mV cart unless user experience strongly suggests the phono is up to it. That's quite a low output and generally requires excellence from the phono...For a lomc it is possible that splitting the budget between cart and SUT and then using the MM input *may* yield better results. I am not a 'SUT all the time' person btw...
Oh and the Sculpture A carts and SUT are both worth a look in addition to the other good suggestions above.
Caveat: I am in the trade and have a relationship with Sculpture A.
I would hesitate to jump into a 0.2mV cart unless user experience strongly suggests the phono is up to it. That's quite a low output and generally requires excellence from the phono...For a lomc it is possible that splitting the budget between cart and SUT and then using the MM input *may* yield better results. I am not a 'SUT all the time' person btw...
Oh and the Sculpture A carts and SUT are both worth a look in addition to the other good suggestions above.
Caveat: I am in the trade and have a relationship with Sculpture A.