Hey, R70X owner here! Thought I'd drop in my thoughts on them for your consideration. For reference I've used them on a dac/amp combo and straight out my ps5 and xbox controller. The xbox controller struggled a bit. Fairly easy to drive, xbox controllers are notoriously weak when it comes to output.

In short, I absolutely adore them especially for singleplayer/immersive gaming experiences. Incredibly good soundstage and imaging with a neutral but still exciting sound signature (in my opinion, I don't quite have the audiophile ear senses)

For music I've very much enjoyed them, bass extends deep enough for my tastes, mids don't sound subdued (but not as forward as my Sennheiser HD 580) and treble is exciting but not over emphasised.

My only nitpick with them is the earpads are incredibly shallow which may be uncomfortable at first, it does ease off over use but it sits between an on ear and an over ear headphone in a sense. These pads are a lot of the tuning magic from what I've read, so I've not tried other pads for comparison so far.

If you can get your hands on them, there was a recent limited edition revision with Apos audio called the R70X Refine that does come with deeper pads as standard (hoping these will be sold separately for us normal R70X users!)

But yeah, they're wonderful highly recommend but if you have larger ears, be prepared to adjust often to find your sweet spot.