Enlightenment. Power conditioning sucks.
I plugged my computer into the wall instead of Ultimate Outlet and it made it sound faster on the surface but the AC noise made it sound more open which masked low-level resolution. Background wasn't black anymore! Ultimate Outlet was little better overall, but it made it slower.

Power conditioning sucks. I don't want to pay for something that makes it worse. The background just needs to be as black that it is acceptable. The more power conditioning you add the worse it gets overall because eventually you won't hear an improvement in blackness anymore.
Only power supply manipulation with P300 Power Plant is good enough because it doesn't add any weaknesses. I don't like the muddy input transformers but MWave4 is so good that it makes it better overall. Clean Sweep is important too.
Now I know that I'm not getting the Premier, I just need something small to put between P300 and wall that reduces AC noise little more than Ultimate Outlet but still sounds faster. Premier would be overkill in blackness.
So my choice is either Duet or Nordost Thor. Thor should give a blacker background, but what about the speed?