

Get a nice hardware capable of running opnSense and use that immediately after your new ISP device. Just ignore their WiFi router, it will be crap whatever it is, unless you cat reflash with OpenWRT.
Be prepared that the new ISP will .most probably have CG-NAT.
Note: opnSense is based on *BSD so make sure the hardware you buy has supported 10gb network cards, at least two.
Another point: 8gbps is mostly pointless. I would stay at 1gbps inside home and don’t bother to rewire and replace all my home equipment. That’s a long con game over the years slowly when each device has to be replaced anyway.
Maybe plan for 2.5gbps inside for the time being of you can do that a zero cost like reusing wiring.
I wouldn’t count on WiFi in any case, at best it’s a jimnick at that speed.