Thanks for all the suggestions people!

I am on the fence about open back and closed back... I do most of my keyboard playing and sound mixing at night in my smallish 2 bedroom apartment when my kids and wife go to sleep. I am worried how loud the sound will be coming out of the headphones and whether it will be enough to keep the family awake - Hence i am leaning towards the Audio Technica ATH-M70X...

@Zuki - wow those HE-1s! just WOW I watched a few videos on them last night out of interest. 60k USD for a pair of headphones.!!!! I would never want to take them off.