Moondrop Blessing2 + Spinfit W1 tips + balanced modular cable + Fiio BTR3K
This setup is comfortable and secure in my ears all day long & sounds great on the 2.5mm balanced port of the btr3k. I usually keep in it LDAC or APTX-Hd and its basically indistinguishable from lossless. Plenty of power and an overall pleasing sound signature thanks for the AKM dac.
I reached a slight different conclusion
DAC: BTR3 (same choice as yours)
Headphone: "Etymotic ER2 XR" $100
The Negative? You have to make ONE more purchase. You need to purchase COMPLY tips as the stock ones don't last long.
These headphones are so sensitive (15 ohms), that you can easily power them off a smartphone alone. And, you can't even turn the BTR3 to full volume.
They beat every Chi-Fi underneath it, and the next step up is likely the $300 range.
I still purchase other headphones, but I don't any other IEM's anymore.