I recently got a C9 and am loving it! However, there are two things I'm trying to work through.
I'm moving from an E6 and the motion on the C9 is better. I understand it is better, but I legit cannot stop noticing it now so much more than I used to. It just seems to me that I see a lot more motion blur. Weirdly enough I noticed it most when I was watching stand-up comedy on Netflix. I get the quality of the source isn't as high, but it just seemed like the edges were always a millisecond out of focus. It's hard to describe, but I can't figure out what to do to get motion nailed down.
Secondly, I'm trying to still figure out how to best make CEC work. Right now I'm struggling because my receiver does not support Dolby Vision passthrough so I'm connecting all of my inputs directly to the TV and then using ARC to send the audio back to the receiver (with the exception of my BD player since that supports a second audio out). I know this isn't ideal, but I do like the fact that everything generally seems to work well together. The issue is that I have HDMI 2 go to my receiver for ARC, but often my TV will switch to it when I'm attempting to watch a BD for some reason (even though the BD player is HDMI 1). Again, I know I'm not doing the best job of describing this, I apologize. I wish I could just turn CEC off for a specific input. If I want to watch a BD I should be on HDMI 1 and the AVR should be on AV1, however CEC automatically switches the AVR to Audio 1 (which would be correct for everything else) when I correct this and switch the AVR to AV1 CEC then switched the TV to HDMI 2. It is caught in an endless loop. Any advice?