Tube or solid state phono stage?

It really depends on the specific example of each, as opposed to a broad generalization. There are excellent examples of both technologies, so I’m confident you can find examples of either that will play well with the rest of your system.

I went with a solid state Hagerman Bugle based on cost/curiosity, and was pleasantly surprised...especially after making some mods.   However, Hagerman's upper line is tube, which I'm ultimately interested in. (Cornet MM/ Trumpet MC)

I agree with @knotscott, there are good (and not so good) examples of both topologies. Generally speaking, good SS phono stages can be had at moderate cost. If you want a quiet and dynamic tube phono stage, the cost of entry will go up. At least that's been my experience.

The ARC Ref Phono preamps are quiet and transparent - not tubey at all. Your Ref 6 will sound great with a Ref Phono 2 or 3.