I also have a CRATE Blue Voodoo head and cabnet.
Both are great. Aside from that, I run through a BOSS GT-6 Processor, Jackson Guitars, Seymour Duncan pickups, Dimarzio cables, and Clayton medium triangular picks.
I also,....everybody on here is gonna hate my guts for this, but I fuckin can't stand amp distortion!!!!!!!! Go with processed distortion, it's 10 times better. Get a BOSS Metal Zone pedal, or a BOSS GT-6 processor which has the metal zone settings in it.
Amp distortion only sounds good if you have it cranked up beyond belief,....Plus processed distortion takes all the mid range out, and gives it a much more brutal chunky death metal sound. Most amp distortion is only good if you wanna play classic rock bullshit. Even with the gain all the way up it still sounds dead and limp.
Using a maximizer with amp distortion helps, I think thats what Dying Fetus uses, but amp distortion by itself sounds like ass.