Audioquest Niagara 5000 vs PS Audio P5 mk2 (DSP5)

I am rebuilding my system and been thinking which one will serve me well.

 Both brands are well reputed with more than good consumer feedback. Now I know that they are two different categories of power control. But what would you do if you were in my shoes ?

My system is Chord DAVE dac fed By Aurender N10 streamer. I will be buying Dynaudio Special Forty bookshelf speakers along with a small power amp to play them. My power demand is kinda low. 

Appreciate your valued feedback guys