I have read at least one good thread on the 3500P. It was highly touted. I ask mostly because I always wonder about a company that might specialize in something, vs another company that has a lot more $$$ to throw into R&D (McIntosh, in this case). McIntosh certainly isn't known for their power tech, but they may have the bankroll to create one better than any other (or at least better than Inakustik). That all said, I think I'm going with the 3500P. Huge fan of their interconnects and speaker cables.
McIntosh MPC500 vs Inakustik 3500P
If you were to choose between either the McIntosh MPC500 and the Inakustik AC-3500P Power Conditioners, which would you take?
https://www.mcintoshlabs.com/products/specialty-products/MPC500
https://www.in-akustik.de/en/cables-and-accessories/power-supply/power-filter/reference-power-station-ac-3500p-00763500/
https://www.mcintoshlabs.com/products/specialty-products/MPC500
https://www.in-akustik.de/en/cables-and-accessories/power-supply/power-filter/reference-power-station-ac-3500p-00763500/