most everyone is right hire a pro. if not Key Digital or Audio Authority make products for HDTV distrobution. You will need at least 3 video cables and 2 audio cables to each tv. I've haven't checked the cat 5 tricks yet. i've set up some major appliance stores with 40 or more hdtv's off 1 source. pix's degrade a bit with the dasie chain of hd amps. the first box or 2 pix's are good. as for cable try a 59 copper braid and full copper center conductor ( as used in tv's studios and cable tv headends ). you can get compression 59 to rca connectors. you might also try mini coax if cost is not factor. dave