I recently went through this process myself. After lots of testing and polling and research on Rokslide and the google machine, I had it narrowed down to Marsupial Gear and Alaskan Guide Creations.
I decided against Kuiu and Badlands for several reasons. One of them being that neither is made in the USA, and yet they both still retail at or above what Made in the USA systems do. Sorry, not paying extra for something not made in America! Also, I didn't like the Kuiu for the fact that I couldn't have the binos separated from the harness effectively and still wear the harness, like if I was glassing from a tripod. The Badlands protected everything great, but my heck it was freaking giant. I felt like I had another backpack hanging off my chest! And I didn't like that it didn't have side pockets for windicator and the likes.
I ended up going with the Alaskan Guide KISS. It's small and simple and fits my binos great. I have no doubt the Marsupial would've been just as good, but at the end of the day, I liked that the AGC didn't have any magnets. If I was you, I would call all the manufacturers of the brands you're looking at and talk with them and ask questions. That's what sealed the deal for me with the AGC! Good luck!