So I've got a B-52 AT-100, and Im looking to get a little extra from it. I can get good metal tones, but I want to push it even more. Im looking to get that crazy over the top level of gain, pretty much the most br00t4lz I can get and still keep all that tubey goodness. I know I should be looking at overdrive pedals, but Im not sure which one will best serve my purposes. I dont need something that sounds good by itself, the sole purpose of this pedal will be to push my sound to new levels.

Suggestions and reasons are much appreciated, Im going to test drive pedals tommorrow. My budget is 100 bucks, but I can stretch to about 130 if needed.