Here is a list of all the balanced phono stages which have balanced circuitry not just the xlr connectors and/or transformer coupling that I have found, please feel free to add others or make corrections:
Aesthetix io (tube)
Aesthetix Rhea (tube)
Aqvox 2ci (ss)
Arc ph2 (ss)
Arc ref2 (tube)
Asr Basis exclusive (ss)
Atma-sphere mp1 (tube)
Atma-sphere mp3 (tube)
Ayre p-5x (ss)
Bat VK-P10 (tube)
Clearaudio Balanced Reference (?)
Ear 324 (ss)
Einstein tt choice (ss)
Essential 3150
Jeff Rowland Cadence (ss)
Pass Xono (ss)
PS Audio gcph (ss)
Simaudio lp5.3 (ss)
Those that are not balanced circuit but have xlr outputs:
cary ph 302
K&K Audio (tube)
Again feel free to point out errors.
Aesthetix io (tube)
Aesthetix Rhea (tube)
Aqvox 2ci (ss)
Arc ph2 (ss)
Arc ref2 (tube)
Asr Basis exclusive (ss)
Atma-sphere mp1 (tube)
Atma-sphere mp3 (tube)
Ayre p-5x (ss)
Bat VK-P10 (tube)
Clearaudio Balanced Reference (?)
Ear 324 (ss)
Einstein tt choice (ss)
Essential 3150
Jeff Rowland Cadence (ss)
Pass Xono (ss)
PS Audio gcph (ss)
Simaudio lp5.3 (ss)
Those that are not balanced circuit but have xlr outputs:
cary ph 302
K&K Audio (tube)
Again feel free to point out errors.