What modem should I buy?

Episode 1514 (1:22:43)

Dean from Acton, CA
ARRIS SURFboard 16x4 SB6183 DOCSIS 3.0 Cable Modem

Dean wants to buy his own router. TheWirecutter likes the Netgear CM500. Leo likes the ARRIS Surfboard. The key is to get a DOCSIS III modem. He'll also want to check with his ISP to see what modems they support. Most support these two main brands. But he'll also want to have a separate router and modem. Routers will change more often than the modem will because they wear out. He'll also want a router that will be updated regularly and automatically to keep him secure online.