Consider the newest line of power regenerators from PS Audio. Why filter dirty power when you can regenerate a virtually perfect sine wave for all of your equipment? Even better, these units significantly reduce the output impedance of connected equipment, I have the P5 unit from the previous generation. Its replacement in the new line is the P12. The P12 is $4999. However, if you have equipment you might like to trade in, PS will accept one or more pieces of equipment and take their value off the price of the new P12.
I have my entire system plugged into my P5 and am only using 30% of its capacity.