Perpetual Tech Dac vs DCS or Wadia Dacs

I have read a review that indicates the Perpetual Technology D/A converters are very close to the perfomance of the Dcs gear. I have not heard either, but I am looking to upgrade from a Meitner Bidat that is currently in my system. I have noticed quite a few PT units for sale on Audiogon, which is not a good indication.
Has anyone A/B any of these units that can shed some light.