Shunyata Triton V3 a step up or good alternative to PS Audio P15?

Better acoustics will improve the sound and may be able to compensate somewhat for a bright sound, but this is not an acoustic problem. When I use the P15, and only the P15, my tinnitus acts up, and I even get a mild amount of vertigo and dizziness. It sounds great but 15-20 minutes later I am running to disconnect it. No other component I have used has done this. 
I want comparable improvement to the sound, but without these artifacts that are driving me crazy.

I've owned both versions of the Denali 6000 as well as the Triton v3.  There is nothing about either that brings to mind brightness.  If you're using any of the above and have brightness, you have bigger problems.  The performance of the Shunyata products has been covered in many reviews -  my favorite being:

http://highfidelity.pl/@main-875&lang=en

Well that's encouraging. A lot of people with the same setup as me love the PS Audio Powerplants, but mine is doing something harsh and fatiguing. The reply is usually, "If it doesn't sound right, it must be your power" but it's a freaking power regenerator! Anyway...

My experience with Shunyata stuff has been a pretty relaxing black background.

Actually, I wonder if the PP is working correctly, either generating bad power, or emitting excess EMI/RFI.

Is it physically close to a key component? If so, does moving it help?

I’ve got it on the floor a couple feet from my components. When I got the P15 I called up PS Audio about the brightness issue and they seemed unsurprised, said there had been other inquiries like mine, and recommended to lower the output voltage. This does help somewhat, but I had to turn it all the way down to 105v (the lowest setting) and it was still a little harsh, and at that point some of the benefits seemed lost. With the low voltage the sound starts seeming a bit compressed. The Multiwave settings can help, but they sound a bit artificial and colored.