SUT advice

I am restoring a Garrard 401 and intend to mount a Ortofon 309D, the 12' version. I chose the 309D for the flexibility of removable head shells and intend to use, alternately the Ortofon Silver Meister SPU(0.3mV) and the Miyajima BE mono cart (0.7mV). I am looking for advice on a SUT, compatible with both carts that will be plugged into the MM input on my Nagra VPS phono.
This is a fun project and not to compete with my main vinyl rig.
Any suggestions/comments welcome
Thanks in advance
Pradeep