I am curious about something related to the 3900/Z7. When playing a poor looking SD channel through the 3900 with processing on, I saw nothing that would tell me it's edge enchancement or NR was operating. It makes me wonder if they have those turned on on the 3900 but not the Z7.
I admittedly don't know what I am looking for, but I see no obvious improvement of SD images. I can see the improvements from the deinterlacer and PReP using the HQV disc though.