The real answer is to test all combinations and see for yourself. I did so and so:
I now run everything into my Sony LED and let it do the processing. My OPPO was not BD ( 102? ) so I bought the good Panasonic. The Anthem now only does the audio. Processing engine in the Sony is very good. So reduced the number of cables and processors it goes through. 'Back in the day" before 4K BD and I had a Visio LCD, the OPPO was a better processor. Shame they switched to making cheap cell phones.
Big issues with HDMI cables. Good ones and bad ones. No "magic" ones. Shorter the better. Belden, Belkin, BlueJeans are trustworthy. Others may be OK, but I had issues and when I cur the cables open found unterminated shields.
Two thumbs up for the calibration. Professional best, but there are downloadable files that can take you through " do you see a difference" split screens that will do probably 95%. I found them to be enough to get realistic flesh tones with differences in ambient light. I was never a Sony fan, but sure do like the TV.