I had an earlier version of the 550 hybrid. Had it for about a year and paired it with a Placette pre and can highly recommend it. (probably a little bit less refined than I suspect the Pathos to be, but an excellent budget choice for a hybrid). Needs a NOS tube swap (Telefunken or Bugle Boy) but a bargain on the used market. check out audiocircle, there is a following there.
