I think Sony recognized the problem of no multi channel analog input on the TA-E9000ES when they introduced a multi channel analog out SACD player; and, thus, the need for the TA-P9000ES to add on to the TA-E9000ES. I have one of those too, which today is connected to a Panasonic BD80 for the latest discreet Dolby and other. I understand why this unit is sought after today, since some of today's BD players are like mine, the TA-P9000ES would be a nice alternative to the really expensive pre/pro amps out there today
Yep, I sourced my P9000ES from Japan actually and really love mine. I found it is a bit complexed to connect the P/N/E 9000ES together. My wife can't seem to master how to turn everything on. Sony really did a great job on their digital S-master amp series, especially the STR-DA9000ES, as it is much easier to use.