I'v got two closed headphones. I mostly use them for tracking vocals.
AKG K271 MK II and
BeyerDynamic DT 770 Pro
I really like the DT770 Pro. They are very comfortable and sound great. Some say they color the bass sound a bit, but i think its only for the better.
The AKG K271 MK II are supposed to be the most accurate, but I personally think they sound a bit flat. They also put more pressure on my head/ears so I cant use them as long as the DT 770 Pro, without getting tired.
Anyway, both are really great, but as many already has said, dont forget to also use monitors when mixing.