I listen all kind of music, my budget is about 70 euro/75 dollars or less. My previous headphone are: JVC HaS400, Superlux HD 381F, Lg Quadbeat2, Xiaomi Piston2, Xiaomi Piston3. Maybe the favourite are JVC and Superlux but now I want something better without spend a lot of money. I never paid attention to what I liked or I disliked, I like them all, only the Quadbeat seemed to me lacks of bass.
Ok, the QB2 is pretty good (as is the Piston 2 if you're looking for that signature). If you find the QB2 to lack bass I dont think the Havis would suit you.
I also think that the QB2 is better than any KZ IEM ive heard. If you like to try different signatures the KZ line is excellent for like $10 a piece but in my opinion you can find others that outperform them already at $25-30 (again in my opinion of course).
What's worth what for you only you can answer but as I've already said: the ones you've picked are great in their price bracket but the more expensive will be better. Worth it or not? You decide