What is the most agressive, pummeling distortion you've built?

[micro]

Looking for a bone-crushing distortion to build...

[mars_bringer_of_war]

Who wants to place odds on how many people say Dr. Boogie?   
I havent completed mine yet (soon, very soon), but it still seems to be the high-gain favorite around here.

[Dave_B]

I like the Obsidian BS250 for assaultive, crippling, mutilatory rage.   

[aron]

The Smash Drive has a lot of impact as well.

[foxfire]

for doomy stuff i like the fuzz jade or big muff. there was a thread about this not too long ago, i can't remember what it called but a lot of good pedals were listed.

[foxfire]

found it, http://www.diystompboxes.com/smfforum/index.php?topic=58549.0.