Orbi RBK752

Eero Pro 6 or Orbi RBK752 would be two to consider. You likely don’t need the highest end of either; WiFi 6 is fine for your needs. These will likely only work well if your internet feed is on the middle floor so each mesh satellite gets a feed from one floor away. If your internet and router are lo

If you want the best/fastest speeds, you will need to wire the network components together. Technically, a mesh system that uses wired nodes is no longer mesh, but a router with wired access points. And that will give you the best performance through multiple floors. I looked up reviews and believe

For Orbi route I would suggest getting RBK762/AX5400 (2 pack) and add your AX1800 as a 2nd satellite. Orbi AX5400 is much more powerful and may be better than your other options. If you can find it also look out for RBK752/AX4200 as an alternative to AX5400.

Download the firmware from NG website and manually update them. Make sure you update all the satellite first, then the router. Here is the website : https://www.netgear.com/support/product/rbk752/#download