I see you use the AKG-712 Pro!
Off the top of your head, do you know what is the difference between it and the 702?
Well, first of all, mine is made in Austria, anything under $300 is made in China. Second, 712 Pro is very similar to 702 but prior has a minor mid-bass bump - trust me, it's not a major one, while 702 is a bit more neutral.
One thing I have to say about my 712 is these are BY FAR the most comfortable headphones for long-term listening I got or ever tried.
Do they have 100% absolute reference sound? Not really, but it's damn close. I'd say 9/10. Never listening fatigue or any hint of lack of comfort.
Between these and Sennheiser HD600 it would be close call IMHO.