My experience with many knives is somewhat limited so I can't really compare, but
Kershaw - My "Needs Work" cost $40 and is outstanding. Very stout, the blade can be made wickedly sharp, has pretty good corrosion resistance, there's the speed safe, there zero blade play in any direction, the only thing really off is that the fit and finish is a little less smooth than costlier folers.
Buck - The 119 is another $40 knife that is outstanding. I've never had any corrosion resistance problems with 420HC, and I've owned mine since somewhere around 2000 or 2001. It's been left everywhere I can think of. Edge resistance is great as well; the factory edge stuck with it for something like five years. Then when I got adventurous I touched it up with a file and even that edge lasted forever. It's very stout as well; I've hammered it into the trunk of a tree and stepped on it.
KaBar - I had a USMC Combat Fighting/Utility Knife that was great. Something like $50 when I had it; I never really used it that much over the 119 to be honest, but it was definitely a nice knife. I used a pretty good bit; enough to put an edge on it with a file. I always used the 119 more because it fits my hands better.
ESEE - Not a lot of experience with it so far, but I've had an Izula for about a month and I spent $50 on it. I'm not gonna go on about it, I think it's reputation since enough for it that I can't. I guess I could have said that about the KaBar too though.