Pass Lab X250 or Parasound Halo A21

Looking for a 2ch amplifier, would like to know what is a better buy: a used Pass Lab X250 (with 1 year guarantee) or a new Parasound Halo 21. They are both 250w x2, and they cost pretty much the same. Are they really comparable? I have no chance to listen to any of them as I live in a remote location, so your input would be highly appreciated.
I am currently using a Pio SC07 a PIO SACD PDD9 and Paradigm S100v4.
Thanks for you help.