Ok, for those of you with a 178 I can tell you the CATV outlet by your door that services the flat screen TV you can mount on the wall, the TV amplifier services it as well. Just finished mounting a 19 inch TV/DVD combo with a swing out arm. The CATV outlet does go thru the TV antenna amplifier and can pick up the same stations as the gizmo over the bed.
The swing out works well in that it is easy to lift the TV off the arm for traveling and it just slides back on.
Now maybe i'll figure out how to use the box holding the gizmo over the bed to insert a decent sound system. Question is how to run speaker wire (and how to mount some decent speakers). Need my Miles Davis....