Nature Sound NS5 MKII (the one I have are the bass edition). Crystal clear, leaning on sub-bass. Very good for music ranging from metal to ambient to almost anything complex. These were overlooked for most FOTMs at the time released.
@AcousticAngel I would say it’s pretty well controlled. Afaik there is only the regular version in the market, so I guess that one may suit you even more than the Bass version that I have.
The Noble Knight imo is a super slept on iem. I think the main problem is that it takes awhile for the pizo driver to settle down and over the course of 1 month going back to demo it multiple times it kept getting more coherrent and better in general. Very nice mild V shape with a slightly sharp but never pircing that handles j-edm nonsense very nicely as well as give a real sense of grandour with songs like the cell from kokia and oceandeap from beast in black.