Archaic Decapitator is currently in the middle of recording our full length, "Impalement Ceremonies." We're taking care of all recording and mixing but are in need of good mastering services. If anyone does this or has any suggestions for someone that has experience in DEATH METAL Mastering, send me a message on facebook or the Archaic myspace.
Peerless is a great option, but if you're looking for someone a little cheaper check out Imperial Mastering. Colin Davis (Vile) is based out of CA and does great death metal mastering for reasonable money. A lot of the West Coast bands go to him.