Finally retired my trusty SR876 and replaced it with the RZ720 so I could run 4K sources through a receiver instead of direct to the TV. The only comments I have relate to some legacy devices I have.
I mistakenly concluded I could run my JVC D-Theater HM-DH30000U tape machine into the 720 as it has the necessary component inputs. Only after i got the 720 did I see the fine print that indicates the 720 (and upper models as well) component inputs only support 480i and 576i. No love for the D-Theater 1080i output. Also, I saw that somebody early in this thread had problems using the component inputs. This detail explains it.
Also, I saw that the 720 has 6 analog inputs and I mistakenly concluded that this would support the 6 channel analog output of my Pioneer DV-563A DVD-Audio/SACD/DTS player. OK, that was a pretty naive conclusion that even a cursory look at an image of the rear panel would disprove. Those are not multichannel inputs like the SR876 has.
Anyway, both of these problems were not too difficult to overcome. An inexpensive component to HDMI converter seems to be working surprisingly well with the tape player. And I found a fairly inexpensive Sony UBP-X800 universal DVD and BluRay player that puts out DSD through HDMI, and the 720 is happily playing every format in my multichannel audio disc collection with that.
LG 65LA9650 (upgraded), Onkyo TX-RZ720
ADS L520 fronts, JBL L8400P sub, BIC Acoustech PL-26 center, Mirage Omnisat V2 surrs
NVIDIA Shield Android TV box
Last edited by Bill Ball; 12-09-2018 at 12:43 PM.