I've had my ATH-M50 for about 2.5 years and finally figured out what I don't like about them, the bass is a bit floppy. So I'm looking for something with a little more definition in the lower end. The price range can be anything below the flagships, amps can be suggested too.
I've listened to a lot of headphones and felt the beyer 990s had too much bass that it overwhelmed everything, the beyer 880s (250 ohms) were really close, but had some really harsh treble making some tracks unlistenable. The sennheiser hd 600s were really close to what I wanted, but there was just something missing from them, maybe I didn't spend enough time with them. I'm not a fan of the Grados I've heard (80, 125, and 225) mostly because of the trebles. I listen to a lot of metal, and I did not like the way the guitars sounded on the denon 2000s or 5000s. They just didn't sound right, those cans colored the distortion all wrong. The AKG 701s didn't work either, everything sounds too far away and spaced out on them.
Music I listen to is a lot of different types of prog-metal/hardcore/metal so that is kayo dot, maudlin of the well, neurosis, isis, converge, touche amore, agalloch, and the dillinger escape plan.
What are your source files? MP3, aac, wav or aiff? What is your source? DAP, computer, OS etc. Any dac in the mix? Any amp? Portable or home use or both?