Balanced power eliminates what is called common mode noise. It is the same noise reduction principle used in balanced, XLR, cables. These types of power conditioners are generally transformer based and are recommended for low power devices like the preamp, CD transport, DAC, DVD player, tuner, etc. Unless you purchase a very high power conditioner, balanced power is not really beneficial for power amps because they can restrict dynamic range, or worse, overload the device.
I use a Tara Labs AD-10B. It has non-balanced outlets for high power components where I plug in my Sony Wega and power amp. Everything else goes into the balanced outlets. This also has the advantage of eliminating ground loops because everything in my system is plugged into it. Thus, there is only one plug, and its ground connection, to the wall... the AD-10B itself.
I use a Tara Labs AD-10B. It has non-balanced outlets for high power components where I plug in my Sony Wega and power amp. Everything else goes into the balanced outlets. This also has the advantage of eliminating ground loops because everything in my system is plugged into it. Thus, there is only one plug, and its ground connection, to the wall... the AD-10B itself.