The Computer Boy - recently published an article discussing the use of combined Router/Modems often provided by Internet Service Providers verse using a separate modem and router.  The summary of the article is to first determine what you need.  If you don’t need additional or special features, the combined Router/Modem will likely work just fine.  “If you want the latests wireless hardware or additional features, you can get them by purchasing your own router and connecting it to your modem. You’re trading some simplicity for more power and choice.”

You can read the whole article here –