Roamio Plus and mini to replace comcast boxes

I currently have Comcast dvr service and a digital box in our family and living rooms. I have 2 Premiere boxes on lifetime in our bedrooms.

I am considering dropping the comcast equipment for a Roamio Plus or Pro and a Mini in the room that we rarely watch TV in.



Any pros or cons to doing this? I will drop the cost of the digital box and I think we would get some sort of credit for the DVR since its already included in the package we have. I am also looking to renegotiate our service with Comcast in the near future.