Elliot, The phono stages in both of my phonolinepreamps have sufficient gain to handle any LOMC cartridge. I am going to generalize and say they both produce a total gain (including linestage gain) of more than 75db, probably more like 80db. They are both fully balanced designs. (One is my modified Atma-sphere MP1; the other is Raul’s 3160 Phonolinepreamp which can be configured for either of two levels of MC gain.) No MM stage is involved. 80db applied to the MC2000 output is enough gain to drive my Atma-sphere amplifiers with room to spare, and the amplifiers drive Sound Lab 845PX speakers which I have modified to make much more efficient than stock. To the OP: I have no beef with SUTs. I have heard SUTs do a fantastic job paired with an excellent MM stage. I just chose not to go that route. I can’t even give you a good reason why, except maybe I am a cheapskate.
I've experimented with "transimpedance" stages, and I prefer the above two preamplifiers to what I have heard in my system. Let's call them "current driven", not transimpedance, because the latter term implies that impedances make no difference. They do, or it does make a difference.