Need a solution

[fourharrs]

I have a rental cable modem router and want to buy my own. I have a two story house and need a stronger WiFi signal to run 3 game systems and several smart TVs. Any suggestions for an upgrade that will help

[plemans]

are you wanting a modem seperate from the router? 

Are you wanting a combo device? 

What size is the home? 

what device do you have? how well does it work? 

What's the budget?