I’ve owned all of those brands and CRK is the only that has stuck around in my collection and always will. Olamics are pretty for sure, but I didn’t like the way mine felt, and the lock bars were not smooth to access; Medfords are well built, beefy, and sturdy as hell, but unless you love the designs more than most there are better options.
IMO if you’re dipping your toes into that price bracket your three best choices are a CRK (pick the style and size you most prefer), a Hinderer XM-18 (two sizes and a variety of styles to choose from), or Shirogorov Neon or F95 (basically two different sizes of the same style). If you want something slightly harder to get though you may put your name in the hat for an Oz Roosevelt lotto on their website. Probably my favorite knife and falls within your price bracket at table. But if you don’t like it you can always sell for much more than you bought it for (only knife listed so far that can say that).