Honestly you dont need to go too crazy with IEMs,And which headphone or iem i’d buy?
you could go for a Campfire Andromeda if you want an IEM for 1,000$
But if you want something cheaper.. there are tones.
FiiO FA7 (I heard these are good for their price)
Audeze iSINE20 (I really liked these IEMs, so im recommending these)
Noble Audio (if you want more fancy looking IEMS)
Tin Audio T2 & T2 pro (i've never tried these, but people like them and they're under 100$)
and much more, buzz around in these forms.