I want to replace the router/modem Comcast with a high quality for streaming

Mesh network like EERO should integrate with your existing router. Unless you’re determined to run wires thru walls. 

@ghdprentice I feel your pain with Verizon. Absolutely terrible customer service. I spent hours on the phone with them trying figure out why my gigabit internet sucked. Their routers are just as bad as their customer service. I ended up switching and adding EERO. no issues and awesome coverage throughout the house. Solid and stable.