Sometimes though, I want something a little harder. So I go to Rage and other metal bands my brother is trying to get me in to. As versatile as the 598s are, they do leave a bit to be desired in this genre.
I do have a pair of ATH M50. Do you think they do the genre justice, or is there another set of cans I should look into that would be an improvement for not too much money? I've heard grados are great for rock, are they good for metal?
As far as amps and dacs go, I have an E17 for portable use and a VDAC II and E9 on my desk. I expect to upgrade the E9 in the future to better drive the Q701.