These are my ringtones in rotating fashion
Carcass - Corporal Jigsore Quandary / Incarnated Solvent Abuse (Spoken intro)
Devin Townsend Project - Deconstruction (Cheeseburger! Cheeseburger! / All beef patties...)
Evergrey - Blinded
Evergrey - Unforgivable (Piano outro)
Meshuggah - Shed
Muse - Map Of The Problematique
Unexpect - Silence This Parasite
and once in a while I'll set the isolated "Day after day, and night after night..." bit from A Nightmare To Remember active for fun.