Cox Internet / Telephone Modem

I currently have the Cisco DPQ3212 (second one actually - first was DOA) issued by Cox.  I understand this is a Docsis 3.0 device so I should have no issues in that respect with the supposed to happen soon speed increase from 50 Mbps to 100 Mbps. My question is does cox have another solution that will provide a separate telephone interface and a wireless modem / router combo.  At my previous address I did not have phone service through cox so I had a single band cisco combo box (wanted the dual band but they didn't have any in my area at the time). or do I need to go out and purchase a new router. The Asus I have now has been flawless but only supports 100 Mbps wired connections - more than adequate for 50 Mbps internet giving plenty of room in there for the occasional bumps in speed provided by Cox Speedboost.  But I would prefer having Gigabit wired connections as having a pipe big enough for 100 gives no room when it is at capacity.