PCIe WiFi card with router or Mesh system ?

I have 1Gb/s fiber that runs into my home on the 2nd floor. My PC is directly below this on the first floor. Running Ethernet down to my PC would mean I have to run it down the outside wall or through the floor. Both seem like they'd be pretty invasive installs.

Currently I have a router and a wifi bridge that connects to my PC via Ethernet. The hardware was provided by my ISP and I want to get my own now.

So I'm between a PCIe card with a router or one of these mesh network solutions. I don't know a lot about networking so I'm hoping someone can point me in the right direction. Maybe there is something I haven't thought of.