Can you use a 12v triggered power strip? One 12v to control multiple 120v devices. They are on Amazon but might be expensive.

There are also current sensing strips that enable outlets once a trigger outlet draws. You can use powering on your AVR as the trigger.

http://www.smarthomeusa.com/smart-strip-power-strip-automatic-switching-surge-suppressor/

An ir controlled strip would be easy to integrate with a universal remote as well. Lots of solutions out there.