Guess it's a matter of preference, Grado's and Alessandro's were once held highly for rock and metal (not progressive stuff). I'd recommend the Alessandro if want Grado sound with bit more bass and less brightness. That said the only headphone I ever liked for metal besides Stax earspeakers is the LCD2's.
I would not recommend the DT770/880/990 regardless of pro or premium for metal.
I find my FA-003's pretty good for metal, maybe find a used pair of HM5's for that matter?
Edited by DefQon - 5/23/13 at 4:50pm