The OP is putting this new pup in a LP without a maple cap. His other LP that he likes the tone of has a maple cap. He will want a pup that is a little on the bright side with high output. Therefore:
...if you get a couple of magnets for a few bucks its like having a whole bunch of pickups to try out for the cost of only one. Custom with a5=custom 5, Custom with A8=custom 8, custom with A2=custom custom etc.
You can't lose.
Metallica Kill Em All tones were a Duncan Distortion. That was my recommendation for you before I knew you wanted those tones even. DD is my favorite Duncan pickup. It was my first and still my all time favorite.