For some reason, I never warmed up to Altone's. They were too bright (upper mids/treble) for my ears. Is this your listening flavor of the day? How does it pairs up with E17k?
Something I'm discovering with the brighter tuned gears like the altone200 is that they sound better and are more listenable when I feed them higher resolution music.
They sound really good with the e17k, but as I'm sure you would imagine, I can't listen to them at louder volumes for too long without them becoming fatiguing.
Still, to this day I'm super impressed with the amount of clarity and detail these have. They really are
a joy to listen to at lower volumes.