[Sjors125]

There isn't such a thing as "high quality cables", that's just plain marketing bs. Only thing that matters is the bandwith of the cable. You have 4 different types. Normal, High Speed, Premium High Speed, and Ultra High Speed. Any certified cable can send the right amount of data through it.

It doesn't matter if it is an AudioQuest that costs 200 euro/dollar/pound or a no name cable coming from Amazon that costs only 5 euro/dollar/pound. Digital is digital. It works, or it won't. So first thing you need to do is find out which bandwith you need for your home cinema wishes. When 4k, HDR and HD audio, most probably Premium High Speed is sufficient. (Only most demanding throughput needs Ultra High Speed cables). Then you find a retailer that has those for a normal price. Anything more than 10 euro per meter is really throwing away money. Only when transfering data over extreme lengths, you need other cables, with fiber instead of copper on the inside. But, those cables also don't need to be expensive. If someone claims the video looks better or the audio sounds better with expensive cable XYZ and even his mother in law can see/hear this, just keep your wallet closed and run to another store that doesn't want to sell you fairytale-cables. 

Edit: spelling