Yincrow RW-9 has stronger bass than NiceHCK ME80, so I think you can choose Yincrow RW-9.
However, since the bass of Yincrow X6 is emphasized more than that of Yincrow RW-9, I think it is better to select Yincrow X6.
And, Yincrow X6 has the same driver as Vido/NiceHCK Traceless, and only the cables and plugs have been refined, so the sound quality is almost the same.
So if you choose Vido/NiceHCK Traceless, you can add to buy the RY4S below.
The RY4S UE cable is also bass earbuds.
It is the first, second, and fourth options on the following pages.
https://www.aliexpress.com/item/32820438211.html
You can also enjoy re-cable with RY4S MMCX PLUS.
It is the second, fourth, sixth, eighth and ninth options on the following pages.
https://www.aliexpress.com/item/33038850404.html
The HE150 is also highly recommended if you have willing to buy on taobao.
https://item.taobao.com/item.htm?id=541083718151
if you have enough money(about $80), I recommend you SMABAT ST-10 most...
#Last but not least, thank you to the authors of FR Graph.