Good competitve gaming headphones for about 500nzd

Hi all, i am in the market for some good headphones for gaming, i am currently rocking a pair of dt 990 250 ohms,with my darkvoice amp and am looking for something that will be great for just gaming cause i am very happy currently with my dt990s for music.

The 990s are already excellent for gaming what do you want upgraded off the 990? The only thing I would personally do is getting a solid state amp to have a more accurate imaging and soundstage presentation as tubes can mess with it a bit.