Like the title says, I'm considering switching over to the Roamio. I currently have a Tivo HD (2 channel) with lifetime subscription. If I move to a Roamio, can I switch my lifetime subscription over? Or, do I just keep my existing HD & put the Roamio in another room? Confused about how the switch would work. What are mini's? I see people talking about these. Lastly, where is the best place to buy the Roamio? Any value in selling my old HD box? Not sure what steps I need to take here. Any help would be greatly appreciated.