If your devices only support up to 4K at 60Hz, a "premium high-speed" HDMI cable (18Gbps, HDMI 2.0) is perfectly fine. Again, just avoid really old or thin cables. Early HDMI cables (HDMI 1.4 or older ...
Most people leave their TV settings untouched, but if you have a Samsung, a few quick adjustments can significantly improve its visual output.
I kept losing my cursor on a big monitor. PowerToys Mouse Utilities fixes that with Find my mouse, Mouse Jump, and Crosshairs ...