I have two dedicated circuits, one for my amps and a separate one for my front end. I agree w/ Brauser that far from obviating the effectiveness of power cords and conditioners, their effect is more noticeable. Good luck.
Dedicated circuit
Wonder how many folks put in a dedicated line for their hifi. I added a 20 amp home run years ago, cost under $200 and the results were incredible. I swore off high priced power cords after that.