Well the best sub 500 cans for gaming are kinda the DT 1990. Many agree on that. If you want to have something cheaper I think DT 990 600 Ohm with Modi/Magni 3+ are very good and wont disapoint. Beyers are just good with soundstage and pinpoint trebble imaging.
If you want to have what is almost a book about gaming headphones check out this: