Bought these for TV. Hopefully they are good enough. Price drop on these since last posted. https://www.ozbargain.com.au/node/750172
3-color combo 8K HDMI cable supports high bandwidth HDR with a 48 Gbps bandwidth range; The 8K HDMI cord offers more than 2x the HDMI 2.0 bandwidth of existing 4K HDMI cables; Supports a 21:9 cinema aspect ratio, HDCP 2.2, 32 audio channels and a 1536 KHz sampling rate
High speed HDMI to HDMI cable supports up to 8K (7680x4320) including 4K and 1080p; Fully compatible with HDMI ARC (Audio Return Channel) features for immersive audio support including Dolby Atmos and DTS X surround sound 7.1 and 5.1
I encountered some issue when using HDMI 2.1 cable > 3m (intermittent disconnection mainly, screen black out then restore, something like that), especially when used with the cable is coiled, going through adapters (like hubs and audio extractor) and AV receivers when you're really taking advantage of HDMI 2.1 (4K120 or 8K60 w/ HDR and eARC). If you see similar problem, better try a shorter cable.