I bought a new DAP recently, so I’ve been on a bit of an IEM shopping spree the past few weeks, trying to see if I can better my old cheap Panasonic HJE350 IEMs… here are some of them…
QKZ DM7 - $7 junk, muffled treble, poor bass

C610 - not bad for under $10, but a bit on the bright side

ADV S2000 - very mid-forward, not my sound preference, and poor fit for my ears. $25

UiiSii CM5 - very nice, especially considering the $20 price, v-shaped sound signature, decent amount of detail, good fit

TinAudio T2 - nice, clear, detailed sound, more toward neutral sound signature, good fit, $40

Pioneer CH9T - nice, clear, detailed sound, slightly V-shaped sound signature, decent fit, $80

iBasso IT01 - fantastic, V-shaped sound signature with plentiful and clean bass and good detail, great fit, $100

With that said, I still like my old inexpensive Panasonic HJE350… great v-shaped sound and great fit. Granted, we all have different tastes and ears.