Clearly DiM 'cause I'm not really into the active stuff simply because I don't want any batteries into my guitar.
When I'm talking about EMG I'm talking about active pickups.
I've never had the need to buy passive pickups other than DiM or SD.

BTW it just crossed my mind that DiM Humbucker from hell (Paul Gilbert) and SD Screamin' Demon (George Lynch) would both be even better options...

DiMarzio: http://www.dimarzio.com
EMG: http://www.emginc.com