Past prime, but not at the bottom!
So, I guess I'd agree that that x900z series are clearly past Sansui's prime years. But lets face it, that does not mean they went completely to trash. Think of this as a sine wave function with x0x0 and Gx000 series at the peak. The 8900Z is just on the falling slope NOT AT THE BOTTOM. It took several generations to get all the way down (if, indeed, they did). I think some of these slightly off-peak units may be the real bargains for exactly this reason. The AU-D9/D11 (which I believe are about the same vintage) are another good example. Now to be fair, I much prefer to LOOK at the Big G's, but then this is supposed to be mostly about listening, right? I find the two lower-end x900z's I own to be very, very pleasant listening! As a matter of fact, I am hoping to acquire an 8900Z and/or a 9900Z for my collection.
John