I am having a number of routers in stock. Linksys WRT3200 with terrible WiFi, Asus AC3200 with Merlin WRT firmware (its WiFi is faulty), GL-iNet B1300 (with poor WiFi on 5GHz).
I want to switch to a powerful router than can spread WiFi signals across concrete walls, repeaters have not been a good idea in the past.
Besides that, I want 5Ghz clients to directly connect to ISP (no Wireguard or OpenVPN) and any client connecting to the 2.4Ghz band to connect with Wireguard (with Wireguard client set up on the router).
Budget is up to $300.
Any recommendations, please?