I use EMG 81 Bridge & an EMG 60 Neck - I love em, they're in my ESP Explorer...
I've always wanted to try a Tom Anderson H3 - Pepper Keenan uses em in his SG's...
Here's whats on the Tom Anderson webpage:
"H3 Our original super hot pickup. This is the pickup used for developing, testing and insuring the great tonal quality of Mesa Boogie amplifiers. The sound is open, not muddy, but with rich, full mid and bottom end tone."
http://www.andersonguitars.com/tonelibpickup.cfm
I find the 81 gives me more "depth" or "range" in my palm mutes, if that even makes sense...I can get thicker/heavier chugga chugga type palm mutes going as appose to passives.
I've tried a Dimebucker and thought it sucked big time...also wanted to try a Bill Lawrence L500 as mentioned above....
Tons of options...But from direct experience the EMG 81/60 is killer!