Some things to take into consideration...
Will you be listening alone or with others?
How far will you be from your preamp?
What characteristics are most desirable to you - clarity, lack of fatigue, bass, midrange, treble, soundstage, etc.?
How important is comfort? Some people tolerate heavy headphones better than others.
Those lead to considerations like closed or open back headphones, whether they have a removable cable(s) or not, and may help narrow down your choices based on the sound signature you prefer. They all sound different.
If you like the Focal sound (you probably listened to the Utopia), consider the Massdrop Elex. They don't have the bass of the Utopia, but to my ears, they sound more balanced and are $700. I have more expensive headphones that do certain things better, but the Elex are one of my favorite all around performers. They should be easy enough to drive, I have the Modwright LS100 and the headphone amp specs are the same as the SWL 9.0 I think. At about 10 o'clock on the volume dial, that's plenty of volume for me. They have a common type of headphone cable, so it's easy to find aftermarket cables for them.
Will you be listening alone or with others?
How far will you be from your preamp?
What characteristics are most desirable to you - clarity, lack of fatigue, bass, midrange, treble, soundstage, etc.?
How important is comfort? Some people tolerate heavy headphones better than others.
Those lead to considerations like closed or open back headphones, whether they have a removable cable(s) or not, and may help narrow down your choices based on the sound signature you prefer. They all sound different.
If you like the Focal sound (you probably listened to the Utopia), consider the Massdrop Elex. They don't have the bass of the Utopia, but to my ears, they sound more balanced and are $700. I have more expensive headphones that do certain things better, but the Elex are one of my favorite all around performers. They should be easy enough to drive, I have the Modwright LS100 and the headphone amp specs are the same as the SWL 9.0 I think. At about 10 o'clock on the volume dial, that's plenty of volume for me. They have a common type of headphone cable, so it's easy to find aftermarket cables for them.