I may be a little late here, but you may want to consider just running multiple (4-5) cat5 drop to ever tv location. Then centralize all of you cable/sat boxes in one spot, lets say the basement. Use the appropriate baluan to send your signal to your tv, then use in IR repeater to control everything. It may cost a bit more, but looks so much better when you are using flat screens hung on a wall. If you plan on using HDMI this gets a little $$$ but can still be done.
