I'll toss in my 2 volts here on the subject

I used to own a Hydra 6. It was fairly good in spite of not much being inside it.
When I simplified my system I used an Audience
aR1p with a PS Audio Juice bar (which is just a power distribution box).
It was better than the Hydra.
I had the idea to add a second aR1p to one of the outlets on the Juice bar, and then plug my CD player into that.
Big improvement in soundstage.
That got me thinking...
The Audience
aR6 and
aR12 had even better filtering as well as having all the outlets isolated from each other.
I took the plunge and ordered the aR6.
OMG!

What a big improvement in almost every area!
And... it didn't choke my amps. Every other conditioner/filter I ever tried always seemed like it was throttling back my amp, and I ended up plugging them directly into the wall, but not the Audience units.
Yes it's expensive, but the aR6 about the same price as the Hydra 8.
The aR6 & aR12 also come with an Audience Power Chord, so take that into consideration.