Sony DVP-S9000ES vs DVP-NS999ES

I am in the midst of deciding whether to purchase a used DVP-S9000ES (now discontinued) or go with its replacement, the DVP-NS999ES. The latter has multichannel SACD playback which is of absolutely no interest to me (DVD video playback is the only consideration). So the question is: does the newer DVP-NS999ES offer any real improvement in video performance? The latest issue of TPV states that it offers "a host of new image-processing technologies", the most interesting of which is Precision Cinema Progressive. Isn't this circuit also part of the DVP-S9000ES? I have also considered the Pioneer Elite DVD players. Opinions please- thanks, Linc.