Recommend me some mesh kit.

I want to upgrade to a mesh wifi network as I'm currently still using a wired Linksys1900. I'm very sceptical of wifi as I live in an apartment with concrete walls that the signal simply doesn't penetrate well enough to play 4k rips etc. Therefore I need to use wires to connect my minix media player to the NAS. I have an extender for when using phone and ipad in other rooms. But it means changing networks.

Can I buy a Netgear router that has 4 ports so i can wire in my media box etc but use the extender boxes for wifi coverage around the home on mobile etc?

Was looking at the MK63 and hoping I can pair this with a 4 port router?

Thanks.