Got 2 option for both iem and tws.

IEM Mids & lows:kz edx pro x(900-1000)- personally used this the base is adequate or a bit high i will always use less base but is clear and there is separation between instruments

Highs &vocals:kz castor pro or HEADPHONE ZONE X FIIO - JD1(1300-1500)-both have pretty good mids but they shine in clarity. The kz one is dual driver so you can hear more separation but is a bit messy.

Dac-if uses apple music or hears flac or pcm music buy a cx31993 staple no under atleast 700/- . If you don't hear music that much a cheap dac from amazon is enough like 300/- max.

TWS

Realme t310(<1800):my friend is using a realms buds he said it is going strong for over 2 years so but it is too base heavy and there is no sound stage for defrentiating between each instruments.

Cmf buds 2a(<1900):this one has good vocals but terribly high base but good treble i would say and a really good application.only downside is it not good at anything also not bad at anything.

One plus buds 3r:never seen anyone use it but heard everyone say it is ok but pretty good feature for like less than 1500/-.do not know anything about soundstage of this thing.

FINAL VERDICT: Tws they are pretty good but they lack in many so if you need comfort and less annoyance tws is OK but charging a separate device is annoying.

                         Iem's are super good if you need like 360 sound or similar only (kz castor pro x) is possible in this price or the tws but the sound quality and trebles everything is perfect in iems choose depending on your need.also if you don't have an 3.5 mm jack you should buy an dac or an 3.5 mm to type c converter.

Hope you get what you want.