I have a docsis3 Motorola Surfboard sb6121 which has served me well. The few times I've called for support, the tech (not the first line variety) has commented on the quality of that modem. On 06/14/2015 11:48 PM, gcs8 wrote: > If you can and you are not going over 100/20 package get the SMC > modem, the Netgears have been a crapshoot and even the comcast reps > will admit it.