I agree with @theflattire
You are going through all of this research using a Schiit Mani phono preamp? You have to be kidding. I have one as a back up. And when I auditioned it my system just to see how it sounded it was really lacking in presence, percussive articulation and lack of low end. Keep your cartridge and up the anty for a phono stage. Trying to audition a good cartridge through a Mani is like trying to look at a museum painting through sun glasses. Just saying. Good luck.