My 2 cents on buying an iem with more reliability ( around ₹2000 )
I've used around 4 iem so far (moondrop chu , tangzu waner , chu 2 and zero 2)
I'm not going to comment on sound since it's highly subjective.
The others I've used had some kind of issues.
Chu 1 had channel imbalance and i literally had to clean it a lot and literally do CPR to somehow fix it till one side didn't work . This was around 2 months mark.
Chu 2 with maintainance still had it's paint go off. And had the same imbalance.
Tangzu waner didn't have any issues mentioned above but it's build quality is really flimsy. Its face broke one day when I've accidentally turned my head around to rest on on side of the face. Maybe people would say I shouldn't have done that but this is something which everyone would do. If an earphone can't even stand it then that would be a costly qol. This was around 5-6 month mark.
Out of all these , the one I've used the most is zero 2 which is around 10-12 months. I've literally got no issues with it so far. No scratches or damage to it's shell. No channel imbalance or any other. This will bu far be my favourite so far and I'll applaud it's reliability. I've also only did a very minimum maintained in it and no issues with its channel balance. Although the cable is under average but it still does its job.
So yeah that's it.
Tldr : Zero 2 has the best build and is very reliable. Lasts a long time than chu , chu 2 and tangzu waner.
Ps: This is from my experience but from what I've looked online my experience is pretty consistent with others.