I've decided to look into the he-400 or fiedelio.
I want a headphone for possibly both: he-400
one for mostly gaming: fidelio x1
If I understand it correctly, the latter has a soudstage similar (or better) than any closed headphone, except it is open and not as uncomfortable. And while the former does not particularly excels at any one category, it is one of the most balanced headphones out there.
I was going to go for the DT 770 but I think I might reconsider and just get one can that does it all. I'm probably leaning towards the he-400 although that fidelio does look intriguing. It would definitely be better for gaming, but I think I might want to do more than gaming if I spend 400 and change on a pair of headphones.