I was thinking of purchasing this wifi 6 router D-Link DIR-X1870 AX1800 Mesh Wi-Fi 6 Router which comes with a discount promotion for the Mesh Wifi Extender. I currently have a dlink dir 867 DLINK AC1750. This router is currently situated at the corner of my house upstairs beside my modem, and I can't really reconfigure the location because of the cabling. I don't know if it would be beneficial to upgrade to the wifi 6 router because right now, I'm living in the opposite location of my router, in my basement. I'd get 11 mbps connection speed on my phone on 500 mbps internet plan. Should I opt for the wifi 6 router without the extender or with the mesh extender? Will it be sufficient to penetrate the walls and handle 12 devices connected to my home? I have 1 4k tv and looking to buy another 4k in the future for the basement.