Honestly, the Miracle Man is not the BKP I'd go to for clarity; I think if that's the goal you'd be best served by checking out the Impulse, Rebel Yell, True Grit, Emerald, Black Dog or Riff Raff (in descending output). Any of those can sound incredible through the sort of rig you're using, I'd recommend the thicker the strings you're using, the lower output you go (since the string mass will generate more output/low end).
The Aftermath is a bit of a weird one, I agree about the harsh mid spike it has. I'd stay away from the Painkiller and Brute Force for the same reasons, if I were you.
From other brands, you might want to check out the Dimarzio Fortitude, the Air Norton (yep, it sounds killer in the bridge position and handles the thick string/low tuning thing better than the regular Norton), the Seymour Duncan Custom 5 or Pegasus.
Essentially, I'd recommend concentrating on something in the 8.5-9k range (wound with 42AWG) or the 12.5-14.5k range (wound with 43AWG), and probably stick to Alnico 5 models. There are plenty of exceptions, but that range of wind tends to give the right mid voicing to work great under high gain, without excessive low end muddying things up.
