Buying my own Modem (panaroma user)

I am looking to buy my own modem and router combo for the Gig speeds for Cox due to the issues I am having streaming on twitch. For some reason I am not getting the speeds when streaming, but getting the speeds doing everything else. I did a little research and found there is a certain software the panaromic modems use that interfere with the connection with Twitch. I am looking to purchase the CM600 is a DOCSIS 3.0 from Netgear and was just wondering if anyone has purchased this one. Also, is it compatible with Cox here in Oklahoma. If anyone has any information, please let me know. 980 mbps down 50 mbps up is what I am getting right now and I cannot stream with Twitch.

-Sean