After listening to some classics on MX980 in a dealer's shop, I was disapponited.
The Beethovens and Messiahs and even ABBAs demonstrated just a little better than my MX365.
So I end up with buying HD558 to get a more real music.
To my experience the MX980 is overhyped, its bass performance can't match a hi-end headphone.
BTW, inspired by this thread, I use earpad foams to enhance the bass of MX365, it really helps, the improved sound is comparable to full-size headphones.
Not one Audiophile here will judge you for this...nodda one :)