What separate tube phono stage do you use ?

I use MM and MC with my MP-3. The MM is 3 mV and the MC 0.4 mV. Enough gain either way. I also don't load down my MC cartridge, never have loaded them really. It was something I picked up from Keith Herron who didn't have a MC load selection on the early version of his phono stage.

I would think that 55db gain is way too high for most or all MM and MI cartridges. Usually it’s around 40db ? But maybe Ralph’s preamps can be customized to change the gain.
I am a little surprised than no-one mentioned Lamm and VAC so far, though I am not sure that VAC makes separate phono, perhaps that’s why. What about Conrad Johnson, CAT, some other European companies ? Japanese like Wavac, Komuro ?

VAC does make the Renaissance Phono preamp as well as their Statement Phono pre.  My VAC Renaissance performs well above its price IMO but then again I don’t have the funding to discover out how much better the Statement actually could be...

I have a Zesto Andros 1.2 that was bought used and really like the unit.  Very low noise floor and little apparent distortion, uses 4x12AX7.  Can be switched between MM and MC inputs, lots of loading options on the MC input.  MC gain is via transformers, Jensen JT 44s..  I have one turntable into the MC input and my other turntable with a diy SUT using Jensen JT 347 transformers into the MM input.  
The Andros Deluxe adds a balanced output requiring a slightly different circuit and uses JT 347 transformers for the MC input.

Accuphase C-37.   wonderful sounding phono stage with 3 inputs that save the settings and the MM stage has 100K as well as 47K.

I used to own the Pass XP25 and Esoteric E-03.   the Accuphase handily sounds better.

cheers