The woods smart strip I have on one of my setups has an adjustable sensitivity on it for just what you are saying. In my living room I have 2 subs ,70" tv , 2 emotiva amps totaling 8 channels , bd player, air cleaner, Emotiva pre/pro xbox one, 8 port switch, all plugged into the same outlet so really 3 outlets is overkill. I have a device called a kilowatt that measure's what you actually use, I suggest anyone that is mildly curious to pick one up and see how much power they really are drawing.
Richard