Yep, a Stockholm humbucker sized P90 would be a great choice here I recon. Iīd take it over Blackhawk and A-bomb. It is not unsimilar to the A-bomb, but more raw, hardcore, and just straight up more punk.
As Slarti, who indeed should get P90s, already said they are a best of both worlds thing. Power of a humbucker, low end definition and opennes of a single coil, and a raw roar in the midrange you really canīt get anywhere else. Brutal in a more ferocious way. Yet when you roll the controlls down they can also sing in a lovely way, better than most HBs imho, since the added openness and definition of the SC kicks in.
Should work well here and set you apart in that the other people suddenly sound really dull. =)
Guessing you are looking for a bridge pickup only? If not the Supermassive neck goes wonderfully with the Stockholm (as it is a slightly weaker SH neck which is a bit heavy on everything I find). Or, if you like the neck a tad lower output and brighter, the Mississipi Queen. Can still hold up, but gives a naturally clearer neck sound. Both good combos.
Oh and donīt forget that when you switch from actives to passives that you also need to change the pots to 500k or 550k ones. Important!