I spoke to two recording engineers each with over 30 years experience, an installer and 'voicing expert' with over 30 years experience, and many others at the recent APNOXA audio show in Jacksonville, Florida on the VALUE of power conditioners. Our audio equipment contains it's own power regulation.
Every expert said that there is 'little to no' improved sonic performance to be gained using a power conditioner.
There strongest recommendation is dedicated 20A or greater power lines, installing improved electrical power outlets in existing 15A outlets, and using very reasonable cost cabling and interconnects, such as that Bryston offers.
Many recommended the PS Audio Juice Bar if greater outlets are required; This is strictly bus bars and high end electrical outlets.
This is an emotional topic that few can agree. But I put my faith in the experts who have been doing it more than me.
In conclusion, take your thousands you'd spend on power conditioners, expensive cabling and save up for that Bryston 28B-SST, DAC, SP3, etc.
Cheers, JohnnyB