The Netgear Orbi RBK852 was the first mesh Wi-Fi 6 system to be announced and it costs a staggering $699.99 for a two-pack system, in the UK things are worse, we have to payout £709.99.
Recently Ubiquiti announced the AmpliFi Alien which will be $379 per device.
The Deco X90 is an AX6600 tri-band two-node kit, supporting maximum wireless rates of 574Mbps @ 2.4GHz and 1201Mbps @ 5GHz on its dual-stream radios and 4804Mbps @ 5GHz on the second 5 GHz four-stream radio. TP-Link says the Deco 9 can provide 6000 square feet of coverage and support up to 200 devices. The Deco X90 system also includes a 2.5 Gbps WAN port to support connection to Gigabit internet services.
Similar to the Netgear Orbi RBK852, there does not appear to be a LAN multi-gig port, though if you use either system in access point mode I would assume you can make the most of the WAN port for LAN.
Complimenting this launch are two other systems:
The Deco X60 is an AX3000 dual-band, dual-stream two-node kit, supporting maximum wireless rates of 574 Mbps @ 2.4GHz and 2402 Mbps @ 5GHz. The Deco X60's coverage area is around 5000 square feet and supports more than 150 devices.
The Deco X60 will cost just $269.99 for a two-pack.
Lastly, the budget-conscious AX1800 Deco X20 is available as a two-node and three-node kit. Another dual-band, dual-stream solution, the X20 has maximum wireless rates of 574 Mbps @ 2.4GHz and 1201 Mbps @5GHz.
The X20 will cost $189.99 for a two-pack and $269.99 for a three-pack
All three systems support OFDMA, DL/UL MU-MIMO, and WPA3 and are managed through the Deco mobile app, and they all have optional HomeCare Pro by Avira service which adds antivirus, IOT security and parental control features.