I will start with what I think what attributes good HiFi "gaming" cans should have. A lack of hard bass, soundstage, imaging, detail, and good separation. The K7XX are great cans for gaming. Their soundstage, imaging, detail, and separation are really good. It's just I feel that the HE4XX have better imaging, detail, separation expect the K7XX have better soundstage. Plus the HE4XX have a pretty good low end extension which isn't over powering at all. I would say imaging is more important than soundstage for gaming, but soundstage and imaging should be a married characteristic when describing sound. Having decent to good soundstage with crappy imaging is like having a good idea with bad implementation. Not saying they K7XX have bad imaging. I think a good example of this would be the HD6XX, they have decent soundstage with crappy imaging, and it's why they're no good for gaming. As someone who one the DT 990 250 LE I think the bass hits too hard and the highs are too harsh for my tastes. Both the AKG K712 Pro and the HE4XX would be an upgrade.