I’ve managed to track down an HE-560 from HiFiMAN and a Jotunheim from Schiit ( with optional DAC ). Both items will be up soon.
So far the HE-560 is slightly brighter than the HE-400i. It also sounds uneven using Ayre’s Pink Noise track from the Irrational, But Efficacious album.
The Jotunheim sounds good. There is a lack of crispness to the sound signature which appears to be a a lack of dynamics. Too bad the only way to connect to the DAC is via USB.
I plan on comparing the Jotunheim the the similar-in-design Grace m903.