the most i will ever spend on a HDMI cable is <£5.
hdmi king, kabeldirekt, etc is what i look for on amazon best sellers section.
A £1 cable is the same as a £10,000 cable. If it displays a picture then both will be the exact same.
The problem with £1 cables is that they tend to break easier due to poor build quality. So rather than replacing £1 cables often I tend to spend £3-£4 knowing they will last forever that is what the extra £2 is that I pay for.
Paying £20 for a cable your literally throwing £15 at some stupid marketing gimmick