If you don't have your system setup, now is the time to prebuild the room. Call up a few electricians and get quotes for how much to split a room. "My window ac keeps flipping the breaker when my surround sound is on. How much to get a dedicated breaker for it?" You could probably find a licensed handyman to do it too. That way you have 2 20a feeds to one room. Maybe even one larger 30a. Also shoot for gfci/afci hybrid. If too pricey, the very least gfci.