Painkiller (bridge) is great metal pickup and works very well in mahogany, but I think that PK (neck) isn't what you are looking for (Murray/YJM)...
I have tried quite a lots of BKP's neck pickups (Mule, Painkiller, VHII, CS, HD, MM and Crawler) and I think that Crawler is best for Dave Murray sound. Nice and fat hot PAF sound.