I head that if you purchase an Escient, then the Sony will be supplied as the changer. If you already have purchaced an Escient in the past and wish to add a changer to an existing system, then that is possible also. That is what I know so far. I know that because we had just added one and they were on back order but in limited supply as Escient and Sony worked some kind of deal out between the two.
BNC
DON'T BE FRUSTRATED, GET INTEGRATED! (From a custom installer)