I have experiences with both units and I would not go near a PS audio conditioner. While they create a super black background its at the expense of a compressed sound(in particular when mated with digital equipment). The hydra's do not do this and that would be enough sway my decision towards them, though some folks don't like how the hydra effects PRaT. An in home audition would be needed to figure out if either of these are the answer for you FWIW I don't own either of these units or any power conditioner for that matter, so this is not about pride of ownership.
