I am moving into a new home in which every room is prewired for cable or satellite tv with a central area of input. In my current apartment I have a 5 LNB Directv dish with a 4 wire output. A 4x8 multiswitch is now used to supply 2 signals to each of 4 HR21-700 DVR receivers. In the new house, I plan to add 2 more tvs and dvr receivers. What type of multiswitch and splitters will I need to allow two signals to each DVR? Thanks for the help