Would not go with Pontus if it was me. I have second iteration. Lacks notably in soundstage height. Emphasis of high frequency detail which is quite nice but is not the incisive dynamic sound I prefer. Haven't heard Harmony, but would definitely make sure there is a return policy if you don't like it. Make sure seller pays for shipping in the event you have to return it.
Just about to pull the trigger on Pontus 15th ...
This came up 12 hours ago... I like the small form factor but wonder if the sound quality can measure up.
https://www.youtube.com/watch?v=gUv-Tb87y8Y