Roamio and Comcast

I currently have Comcast X1 boxes. Probably paying around $50 a month for boxes and DVR service. Thinking about picking up a Roamio and a couple mini's instead. My house is already wired so the Comcast Boxes can all stream shows from the main DVR. Guessing this means it is already configured for MOCA, but I'm not really sure. Would I need to buy anything else so that the Minis can work?



Any other ideas of things I need to consider before taking the plunge?



Any assistance would be greatly appreciated.