First of all, great system! I could well imagine to go back to planars someday (had some Maggies in the past).
>>Gear will come and go, but I would not be without these. Stillpoints Ultra SS is hard to beat but in the realm of power cables, research speeds up the product cycles and I have, like many, rode the wave of Cardas, SR, NordOst before settling on HiDiamond, for now. HD product lines let you focus on the music.
Re power conditioning, have you tried other passive filtering like Audience (any teflon version)?