I have the Chinese clone version of these, Superlux HD681-AIR. They're only $25-30 but have flat mids, deep (but not overwhelming) bass that extends below 20Hz, and slightly siblant highs that can be fixed in EQ—but what really sells them for me is the perfect soundstage and imaging. You get amazing 3D audio from two drivers with no fancy software gimmicks required. In games you can pinpoint sounds with millimeter precision. And naturally this (along with the excellent bass response) makes them ideal for music and movies as well. It's A near perfect headphone for the gaming/entertainment PC.
No joke, I've bought and returned $500 planar magnetic headphones that didn't sound as good as these. That said, I'd recommend getting a good pair of velour earpads because the ones in the box are flimsy and cause ear pain. But for the price it is impossible to do better.
https://diyaudioheaven.wordpress.com/headphones/measurements/brand-superlux/hd681-air/
https://www.rtings.com/headphones/reviews/superlux/hd-681 (this review is for the older, non AIR model but the two headphones are identical, other than a resistor added to the drivers in the AIR version to help address the siblance issue.)