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Pass Labs' current model is the Xono with signal path electronics in one box and power supply in another. It's got some favorable reviews and is quite flexible in loading and gain settings. The prior model is the Aleph Ono, which is a one box design. Much cheaper used. Reviewers say they can hear a difference between the two, though. Both have balanced and unbalanced output connections. Good luck.
Check out the Hagerman Trumpet. It is a fully balanced tube phono stage and can be ordered with balanced output for under $2k, which is a bargain. This is one well-designed and seriously good phono stage - fast, neutral, detailed, and extremely quiet. Hagerman's web site is quite informative.
Run away from Aesthetics IO I have one was nothing but trouble sent it in for upgrade paid 6k and it has never worked. Came back with a note might be a little noisey, thing sucks it is so noisy I can't believe they even sent it back that way, worse than when I sent it in for the upgrade. I called them and they do not stand behind there work offered no solution. Love there pre amp so I bought the phono and mono-blocks the mono-blocks continually shut down for no reason no error or anything. Poor programming. Other than the pre the rest of the line is flaky.