I am doing what you want to do, splitting HDMI across 4 sets. I am using a combination of HDMI cable for the set next to the main TV, HDMI over Cat5 for two 75' runs, and a wireless HDMI transmitter/receiver for upstairs bedroom. The system works well. The only issues I have had is when I first set up the system one of the HDMI cables in the chain didn't like being before the Cat5 baluns. When I moved it to after on the other end no problem. And every once in a while I will get some interference with the wireless which causes an audio/video hiccup. The strange thing is it will do it for a dozen times for about an hour, and then it won't do it for weeks at a time. Haven't figured that one out yet.
I use a Harmony One remote to control everything.
Let me just add that the cost to set up my system was $501 (excel spreadsheet
). That was for cables, baluns, an IR repeater, the wireless system, a 1x4 HDMI splitter and 3x1 HDMI switch, plus some other misc. stuff. That sounds like a lot, but I also share a DB player between the 4 TVs, eliminating having a BD player at every set.