Hi Adam: I have indeed experienced successful results in taming sibilance / glare issues via AC line conditioning. Upgrade AC cords furthered the sonic enhancements. My line conditioners are the Chang Lightspeed 3200 ($250, 6 outlets, 15 amp capacity, for source components) & a separate Chang 9900-Amp ($800, 4 outlets, 20 amp capacity, for a large stereo power amp). Even the 9900-Amp would fit your price goal if purchased used; note that it does not constrain current dynamics.
Chang offers many different models such as the 6400, which would probably cover all of your needs in a one-box solution. All Chang models include integral AC line transient protection; look for this feature to be included in whatever line conditioner that you decide upon.
Chang offers many different models such as the 6400, which would probably cover all of your needs in a one-box solution. All Chang models include integral AC line transient protection; look for this feature to be included in whatever line conditioner that you decide upon.