How do I ensure that the current HDMI cables I have are sufficient for HDR in 4k..
I have blue jeans currently. But I bought them a while back. But this is a conversation going nowhere with the X1000ES not working for ****Yep, what flint said or go with blue jeans cable if you want the best. I think blue jeans cable sells some of their hdmi cables on Amazon.
I disagree with Flint on the HDMI cables. Get ones you know will work and hook them up while the system is easily accessible. Make sure to get Premium Certified HDMI cables with a QR code like these from monoprice: https://www.monoprice.com/product?c_id=102&cp_id=10240&cs_id=1024021&p_id=15428&seq=1&format=2.
If you want to stick with Wal-Mart, go with these instead of the Blackweb ones you linked to:
https://www.walmart.com/ip/QualGear-Premium-Certified-High-Speed-HDMI-2-0-Cable-with-Ethernet/55274271
Easy way to quickly identify premium certified cables:
Apparently there's an app that, well, here's what HDMI.org has to say: