I'm gonna put my vote in for the Seymour Lil' Screamin' Demon.
Conversely, you could check out a Duncan or DiMarzio high-output single coil to maintain a similar sound, but get more punch.
Also, don't rule out Lace Sensors. There's some nice features there, like no 60Hz hum, lower string drag, and a really nice lively sound. There's a blue sensor that can give you a fat '50s humbucker sound, and a red sensor that gives you a hot hummer sound.
