Trabec didn’t impress me at all- bulky and heavy, and thinly padded. Didn’t fit either so it was always going back but I don’t think I’d have kept it regardless.
Flux is also bulky and heavy, but has better padding IMO, and the securing straps wrap more under the back of the head than most. I liked mine and crashtested it to death, but it’s kind of a good helmet despite its flaws, which makes it harder to recommend.
Haven’t tried the others, Feature looks ridiculously good value but wasn’t close to fitting 🙁 Fox Striker might be another to look at, it doesn’t have quite as much back-of-head protection as the Flux (but sits just the same as the Trabec on me) and it’s far smaller and lighter. Just feels every bit a better helmet.