Power Connection Options

 
I have a dedicated 20 amp breaker leading to a single wall outlet.
What I was wondering was if its better to connect the main amp (integrated in this case)directly to the wall outlet and the other be used for a quality power bar with star grounding (i.e. all get the same current) and then connect the rest of the high demand equipment(I have two others amps for speakers in other locations) to the star-grounding power bar. I would also connect a second power bar to the first and use its outlets for digital and other.
Or,connect both power bars to the wall outlet, then the amps to the star-grounded power bar and the other equipment to the second power bar?
Any thoughts would be appreciated, Bob