Hi !
congrat' for those stunning kelly you have ! I have to say that reading your title I was expecting you to talk about many guitars BUT Jacksons..; :lol:
At least my KE1 wasn't thaat loose n' bassy !
Apart from that dunno really which ceramic pup to recommend you.
The painkiller would probably cure the muddy issue :lol: : it is said to be the tightest BKP, also VERY clear, with one of a kind huge high mid push. It has a very agressive voicing and full sound.
But for the riffing you're after and regarding the arsenal of amps you have, the PK might not be necessary, which is why Cold Sweat can also be a good (better?) option, as it is said to be one of the brightest in the range, also very tight, with a good crunch but without coloring the EQ (so without pushing the bass).
So wait for more advices, and last but not least,
WELCOME TO BKP ! :good: