Many of KZ's recent budget products (specifically ones that aren't collab) like the ZVX, D-Fi and the Duo are actually really good and well tuned. They've abandoned their usual V-shaped house curve and are now going for more matured neutral tune with bass boost. Though I don't trust the AS line full of BAs, their DD setups are very competent and despite the controversy many other reviewers still give them great reviews.
Zsn pro 2 has a new dd and a new BA, and is really surprising... I think the new drivers will help a lot, and the new ba is much smoother and less 'BA timbre' while maintaining very good detail retrieval. ZVX is really good and very organic with only a mild u tuning and also surprising.
Well done on the sample you are a pro reviewer now. Looking down the reviews of this, blah blah blah blah blah... I knew Lumerion would give me an actually useful take, good balanced review.