Thanks for the info. A few follow up questions.
1. My cable boxes are currently in a remote rack and connect via component to an A/V switch. From the A/V I have component to the TV. Can the main box output component to the A/V switch. If not how do I handle the fact that I have no HDMI cabling from the rack. If I put the box near a TV I'm concerned as to how I get a connection from the main box to the other rooms as all my coax run originate at the remote rack. Can the smaller box for each additional TV be remotely located in the rack. It's my understanding the remote use RF so they don't need to be pointed at the boxes.
Thanks again I appreciate you taking the time to answer.