Coincidentally, I did just deal with my most recent fury-inducing HDMI issue by getting Monoprice 8k HDMI cables and, so far anyway, I'm happy with them. I don't have any plans to go to 8k, but for the price it seemed like possible overkill was preferable to not going big enough.Using Marantz and Denon gear combined with very inexpensive Monoprice Certified HDMI cables, I've had near zero issues over the last 15 or more years? Only when my system was hit by lightning last summer did I go thru a number of headaches. I've now got a Monoprice 50' active optical cable handling the Linux music-video to AVR chores that is working reliably.
As for Marantz, it was an older one of theirs that gave me HDCP grief, though I realize that it wasn't their fault. Ironically, had I illegally ripped my 4k discs and removed the copy protection, it would have worked fine. That receiver was a used replacement for the Onkyo that had to be recycled due to HDMI death (I went with old for the price and the multichannel analog in) but it only lasted a few months before deciding to start making some bizarre noises. In hindsight, I wish I'd disconnected all HDMI before retiring it, just to see if I could blame HDMI for yet another expensive headache.