Please help me for used balanced DAC...

I am looking for Pass DAC D1 or Dodson 217Mk2, "D" or not,and Chord DAC64.
Perhaps too, Electrocompaniet ECD-1 or Benchmark Dac1...
Who listened to the 2 or 3 first units together ?
Help me for taking the good décision.
Thanks in advance at all
Cordially