PS Audio P15 power conditioner vs Accuphase PS 520/530?

I want to add a power conditioner with my study system.  It consists of an Accuphase E-550 integrated, AMR DP77SE DAC, & Ridge Street Audio Design Sason speakers.  I feel no need to change components.  I'm debating between an Accuphase PS 520/530 or a PS Audio P15.

Has anyone compared the Accuphase and PS Audio power conditioners?
Your thoughts are appreciated. 
Thanks Erik, I'm not technically inclined, but you helped clarify how the Accuphase works. I have a predilection towards Accuphase for many reasons.
Just saw this thread. I’ve been selling off my system and my PS520 is coming up for sale next week. Difficult to see PS Audio at this level but who knows. All I know is that it measures line distortion in followed by zero distortion out. I’d suggest reading up on it. Positive Feedback did a nice review a while back. 
I've enjoyed PS Audio components now for over three years.  My last upgrade was to trade up from their P10 power regenerator to the new P15 model, and I found an immediate improvement to the bass, soundstage and clarity in the highs, both from my PS Audio DirectStream DAC and my Mytek Brooklyn DAC.

I haven't had much need to contact PS Audio for support, but the few times I have, they have been outstanding!

Go and take a look at my system page.

I've posted some waveform shots. There are a few with different PCs that give you a glimpse of the actual mess that is coming in from the utility 

You can also see what a clean form comes out. Especially at the peaks.