I’ve got a Bighorn TL3, and unless something changes with ZAI/Bighorn, I’m a customer for life. I can’t imagine the Origin being a letdown, I’ve been thrilled with my TL3. I went with it over other actions because I like controlled round feeding, mechanical ejection, and floating bolt heads I can swap. The recoil lug is integral in the TL3 rather than pinned on the Origin, and I liked that so I can just swap shouldered barrels without having to worry about anything. The machining on them is also superlative, and mine has been great.
The Defiance actions I’ve felt have been very slick and well made, but also tight tolerances. I was impressed with the machining and wouldn’t have an issue with using one at all.
I have no experience with Impact’s, but would like to try one out.
I have no experience with the lower priced chassis’, so I will not render an opinion on them. Mine is in an AI AX AICS, because I’ve wanted an AI since I was a kid and this was the only way I’d ever afford one. Also because my wife got it for me for a late birthday present, which was awesome lol. I’ve experienced no feeding issues whatsoever, and the adjustability and right folding feature have been awesome.
I would absolutely recommend getting a good barrel from a quality barrel maker.
You really don’t need a brake on smaller stuff, but I use one on everything for medical reasons, and it’s awesome when you can watch impacts at 300 from a really shitty position. Loaded up and in a good solid prone, you can just about watch the bullet holes appear at 100 with a good brake.
Matt Stewart in Oklahoma does great work and turns stuff around fast, I got my barrel work done, including cerakote matching the receiver that Mile High cerakoted, in somewhere around 2 weeks.