You seem very knowledgeable about the affordable, kinda-bassy IEMs. I'm trying to figure out what the next step is for me. I like the V80, not just "for the price," but for its excellent imaging and detail. It's got fun bass and detailed highs. On the downside, it's timbre is artificial, its tuning is stressful, and it isn't so detailed in the lower registers. The V90 seems like a very sensible upgrade, and I will buy it at the next opportunity.
The V80 is a great transit IEM, because it is so sparkly and energetic that it overpowers transit noise without being loud. But it can't do everything. The ZS7 often has a more harmonious synergy between bass and treble, and plays indie rock with greater humanity. The CNT-1 is smoother. The King Pro has a superior soundstage, and eye-watering imaging, instrument separation, and detail retrieval.
So beyond the price bracket of the V80/V90, is there something that offers the same strengths (sugary, sparkly treble, very fun bass, easy fit, warm mids, and excellent detail), none of the weaknesses (overly-synthetic tuning, questionable detail retrieval with mids, which are recessed), and some extra advantages (wide soundstage, can keep up with fast music and many instruments)?
Right now, I think the only thing that can beat my V80 in commuting is a V90. But what is the $200+ V80? With the imaging and instrument separation of a $200+ IEM? I bought the King Pro as a 'better V80,' and it is better in many respects, but makes my ears ring.
Also, the TFZ no. 3 appeals to me for commuting, because it is somewhat-isolated, bassy, and easy-to-drive, which will help to gently overpower transit noise. But I already have a CNT-1, which is comparable to the iBasso IT01, and I honestly think that its level of detail and instrument separation is not satisfying for a $32 IEM, never mind $90. I mean, the V80 beats it sometimes.