Headphones are very personal. Do you like a lot of bass, or a totally neutral sound? Do you like it somewhat muted, or strident? Ultimate Ears can create a custom in-ear monitor that exactly matches your preferred sound. How much do you want to pay?
There's a lot of activity in the headphone market these days. See the following reviews:
https://www.soundandvision.com/category/headphone-reviews
I was considering the Audeze iSine 10 in ear ("the Audeze iSine 10’s sound crushes the competition—it’s more dynamically alive, more spacious, and more transparent than any other in-ear headphone I’ve heard so far.") from the reviews above. I liked the fact that it is planar, but finally decided no since it doesn't have noise cancellation or isolation.
My current headphones:
Over the ear:
Oppo PM-1 (Planar) My current favorite headphone. I prefer them to my
Grado GS1000's (predecesor to the Oppo). Very well reviewed. Need to sell now.
Sennheiser RS 195 RF Wireless Headphone System These were a bit of a surprise. I got them to watch television at night without disturbing the neighbors. Amazing bass, but somewhat tinny upper ranges.
In ear:
Ultimate Ears (forgot the model) Custom build to fit in your ear. I normally only use in ear when I travel, but they are so expensive that I'm afraid of losing them so I don't take them so I end up not using them.
Etymotic Research ER4SR Studio Reference Earphones Top pick of the year: (
https://www.soundandvision.com/content/2016-top-picks-year-headphones-headphone-amps). I have an earlier version. You can get custom earpieces made if you send them an impression from an audiologist. These are the ones I used to travel with.
Sennheiser Momemtum In-Ear. I forgot my Etymotic ER4's on a trip overseas so had to quickly purchase earphones at the airport. I was very surprised at how much bass these put out. So usually travel with these now so I don't have to worry about losing the customer ER4 ear pieces.
For a headphone amplifier/DAC I use an Oppo HA-1. Looks as if it's no longer available.
For Tidal MQA streaming from my computer I use the Meridian Explorer2 Digital to Analog Converter. There's a lot of press about the Dragonfly Red. Maybe I'm missing something, but the Explorer 2 seems to have better specs and includes a small cable which goes into your USB port. That way you don't have to worry about damaging your USB hub or the DAC if you forget you've got your headphones attached and walk away. Here's a forum that talks about Tidal MQA and the Red:
https://www.computeraudiophile.com/...t-to-dragonflies-via-firmware/#comment-617554