Sorry I can't offer any direct experience as I am also considering the Plinius sa102 and looking for a good pre-amp combo. I have the Plinius M14 phono stage and love its bass slam with my Shelter 501 MC cartridge.
If you check the threads and virtual systems you will see the sa 102 used with the Lamm L1, Placette audio DB, CJ17LS, and Melos MA-333 to name a few.
Personally, I would like to have a tube linestage between my SS phono and the sa102. I am also looking at the First Sound Presence, Joule Electra LA 100 and Sonic Frontiers Line3 in addition to the above.
I almost bought an Audio Research LS16 Mk2 from someone who was using it with a Plinius sa102 and B&W Nautilus 802's and liked the sound.
I hope you (we) can get some more relevant recommendations