Which HDMI 2.1 cables do you all use btw? I'll need to order it too.
Depends on budget, but kenable certified hdmi 2.1 cables are very cheap and certified.
Also search for FIBBR 8K HDMI Fiber Optic Cables, both these 2 are usually on rainforest the Fibbr ones have been on special promo offers lately and some of the cheapest fiber optic cables going.
True HQ certified, Zeskit certified, Phoossno certified are used by vincent over on hdtv in the past and worked well also. Usually found on rainforest
His videos here:
I myself stick with Ibrah, Ugreen branded cables but they are not always hdmi 2.1 certified but should work, but id be tempted to try the others next time.

Yeah takes some time to get used to the settings. I got the C9 in main living room and they changed enough on this one that I am having to learn it all again
Also yeah not a fan of the way they now got so much on home screen. C9 with its older UI is so much better and simple.