When to choose 2.0 over 2.1 speakers — sometimes less is more

Therefore, you should choose a 2.0 system if you mostly listen to music without a deep emphasis on the bass. You should also ...

I used 8 HDMI tricks to get the best performance from my TV - and most are free

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 ...