Maybe you do not need a new router, maybe you should try Google Wi-Fi instead? https://www.smarthomegeeks.co.uk/hubs-and-controllers/google-wifi-review-uk/
A friend of mine told me recently about this. So I bought it, tested and seriously it is by far the best solution I have ever tried.
If the wifi range is something you aim for, this can be something for you. I have a big house and I tried two routers, a router and a repeater and honestly Google Wi-fi was something that eventually solved my problems.