Hi,

Please recommend a good modem and a rounter that can work together to improve wifi speed and coverage and smart home. 

I am currently using tp-link VX220-G2V Modem from ISP. The coverage is not enough (using extener with two different network names) and seems a bit slow. My internet speed is 500/50 mbps.  I am thinking to get Archer BE550 router, but not sure what modem I should get. Thank you for your help in advance.