MODEM FOR TRILE PLAY

I have the comcast Triple play with 1000Mbps and  want to replace the XIFINITY modem with my own.

I can't seem to find anyone that is capable of handling the 1000Mbps speed, has a phone jack, and is WiFi enabled.and I can't seem to get an answer from Comcast. Can anyone help to identify a modem that is compatible.

Thansk