They’d be a decent upgrade for sure. Nothing beats the SHP9500’s comfort, but the jump you’d get in midrange, vocals and detail is pretty huge.

I have trouble going back to the SHP9500 myself, but it was nice little starting point. With some EQ to tone down the treble, I still use them for longer sessions when working or gaming since they’re so light. However, they fall a bit short when critical listening nowadays. But now I’m going off topic lol.

Either way, hope you like whatever you decide!

It is! I can overlook things like bass because it can be EQ’d in, but soundstage is too important for my tastes.

Lmao I read that sentence after writing it and thought “100% someone is going to point this out” but left it in anyways.

It depends what you value.

The HD58X I felt was more well-rounded. It has wider soundstage and deeper bass than the HD6XX/650. Felt like I didn't need to EQ it and was happy out of the box.

The HD6XX is narrower and more "intimate" (as described by many). The detail in midrange is great and an easy listen. It was OK out of the box, though I used Oratory's EQ and they became one of my headphones for metal.

If I wanted just one headphone and nothing else between the two, I'd probably pick the HD58X because I'm a soundstage whore. However, since I've made an embarrassing number of sidegrades which specialize in certain things, my HD650 is in regular rotation. My nephew inherited the HD58X and he loves them. Both are good headphones.

I'm lusting for a tube amp, so this post certainly doesn't help. Lovely setup you have here.

I bought my HD800 second hand and the previous owner let me listen to them on his Feliks Euforia. I feel like I've been chasing that sound ever since.