RTX 5060 Ti 16GB.
For the features you're looking for, I'd highly recommend the LG C4 OLED TV. It comes in both 55" and 65" sizes and ticks all your boxes: 4K resol...
If you want to invest in the latest technology and ensure that your system is ready for future devices, a WiFi 7 motherboard might be a better choice.
I also use OWC dock station, love it.
All these motherboard brands are OK, personally, I love ASUS better.
A 850w PSU is enough.
Just wait Ryzen 9000 series CPUs released, then 7000 series CPUs will get a big price drop.
Corsair RM850e - a bit expensive than $100, but it worth it.
I use Thermal Grizzly Kryonaut, never has any issue.