I got the seymour duncan blackout in the bridge of my warmoth guitar, it's always giving feedback when i don't touch the guitar. it's an awesome pickup though, i LOVE it, except the fact that it has too much high end, but still, i can get jazz/blues whatnot from it.
i guess your hands can do blues/jazz, but only special pickups can do metal :)
so now the final choice
warpig or painkiller ?