Fidelizer Audio Nikola LPS. I own their Airstream - used as an access point after my Nighthawk. I also have 3 of these - along with multiple tweaks for cleaning power.
A router puts a high demand on an LPS - especially for streaming movies and gaming. Be sure to get one that has a decent heatsink. Unlike a DDC or DAC which has a minimal load and barely gets above room temperature.