Is there any reason not to have tube phono stage ?

over time i moved away from high gain tube phono amps... too finicky and troublesome over the long term

there are truly excellent ss phono stages that i use -- lehmann decade and ayre are two that are my go-to’s (sutherlands are very fine too, though lower in gain)

if i want tubey goodness in the chain i use my c-j or arc linestage

I use a tube Herron Audio phono stage myself, but I wouldn't expect everybody to like the same sound that I do, and some folks might just prefer SS and what it can bring to the party. 

correction, I misread, they need a space after the last zero, before the word ohm, we want 100 ohms, that’s jumper 7 not 8

Project Tube Box 2. I hate to admit it, because I hate it’s bottom jumpers, but it sounded darn good, and I studied the settings, so he could use the same jumper 1 on for capacitance, and only turn jumper 7 ON for his LOMC, jumper 7 OFF for MM.

Really depends on what budget your talking about, a cheap tube phono stage is not a good idea. There are fantastic tube and SS phono stages out there. Implementation is key. Tube ones can be just as quiet as SS if done right.

I'll second the Hagerman Tube Cornet 2.  I use mine with a Shure V15VxMR, very very quiet