Olina SE are tuned perfectly.

People are saying Hexa but I found it to be quite boring

The Zune HD was such a beautiful, well built device. Still take mine out and give it a listen once in a while.

These are great for the price.

My recommendations would be to upgrade the pads when you can as the stock ones can get uncomfortable after long periods.

Also, if you find the treble to be harsh you can try the toilet paper mod. Basically you take the foam pad off the driver and place a single ply of toilet paper or tissue and then place the foam back over. If you find it's still harsh put a second ply .

Don't worry about what others say. Most of the "audiophiles" here don't know much other than just parroting what big reviewers say.

The sub $50 category of IEMs have some incredibly good choices at the moment.

My personal faves at the moment sub 50 dollars are the QKZ HBB - love that bass along with all the rest of the tuning and technicalities.

Rest would be:

2: Truthear Crin Zero 3: CCA CRA (original not the plus) 4: 7hz Zero (loved them at first but then realized they were a bit too light on the low end )

If $10 IEMs can have removable cables then I don't know why Moondrop can't add them to their low end IEMs. I think most people wouldn't mind paying the extra few dollars.