Modem router with phone for xinfinity/Comcast

[Vmastro]

I am new to xinfinity as of today and instead of renting their gear i want to purchase a router modem that is phone capable.  Any suggestions. I normally use my system for only email and surfing but ocassionally streaming.  I am a real novice

[vkdelta]

option#1 - CM500V voice modem + Any NTGR Router such as R6400, R6900, R7000, etc 

Option#2 - C7100V Gateway