Best sounding headphones you have owned?

The absolute best sounding headphones I have tried or owned, including quite a few of the better models, is theJM Audio XTC 2. The price is insanely low for what they represent in both build quality & sound quality. Alongside this JM Audio offers splendid customer service. Take a look at some on line reviews.

I fully agree with the above post by bjorn154.

I recently got a pair of the JM Editions XTC-2 open backs. They are superb hheadphones. The ordering process is unique in my experience. You can actually hJM  tune the headphone to your sound preference.                                                 Build quality is also superb.           

I have had many headphones including a few TOTL.

The JM XTC2 is the finest set of headphones I have heard. I attribute that to the great communication with John regarding preffered sound.

My current ZMF Caldera.....easy.

JM Audio XTC 2.5s here. I feel John could charge double and they’d still be worth it given his tuning services. Really one of the best high-end bargains I’ve found.

I see quite a few mentions of the Hifiman Susvara and HE1000se but no mention of the HiFiMan HE6se.  Just based on price I would have thought that fell squarely between the two.  I have the HiFiMan Ananda's but as my stereo system has gotten much better I almost never listen to headphones anymore.