Alternative router to BT Smart Hub 2 for Xboxes and NAS :: Home Networking, Internet Connection Sharing, etc.

Hi there

I have 500Mbps FTTP with BT via a Smart Hub 2.

I also have a three-disc TP-Link M5 mesh connected to the hub
We have Sky Q and 2 miniboxes.

All the above works well together.

Now the issues:

We have two Xbox Series X/S consoles, however when both are online they clash, are slow, won't connect to multiplayer games etc, which having researched is an issue with the smart hub restrictions and port forwarding.

The only (apparent) solution is a different router.

I also have a Synology NAS and any device connecting from outside the home WiFi network is unusably slow. Not sure the root cause but wouldn't be surprised if it's the hub too.

We have a BT digital landline connected to it but never use it and I don't care if replacing the router stops it working.

So my question is what router would be best for me to get, considering my setup, in the up to c.£200 range? If I need to spend more I will, but £200 feels like it should be enough...?

Thanks!