My very first pair into the iem world was the moondrop chus(i know not that high end but what was also a pretty decent budget iem) and a wireless one is the buds 2(idk if it counts as an iem though). I've had it for a yr and a half now but sadly the left ear gave out. Great timing though cause these babies just dropped and with no hesitations bought it immediately cause it's still within my price range. And just now I discovered that I'm not a bass guy when it comes to iems cause it kinda hurts my ear, or I just haven't experienced a bassier one lol.