Were your Pig Destroyer recommendations in order? Because i only have Phantom Limb but it's pretty good.
On the subject of grindcore, have you heard this album?
It will more than likely be right down your street, but it's only been out a week or two. It's early Peel sessions from Napalm Death, Extreme Noise Terror, Carcass, Bolt Thrower, Heresy and a couple more bands i forget off the top of my head. I'll be hunting down a download in the next few days probably.