I hate anything CRKT. I've owned several, of different models including the M16 tanto. None of them have been worth a flying **** to me. My daily work knife is a Gerber mini paraframe. It beats my experiences with CRKT hands down in every damn category and at only $11.
The spyderco, I have no opinion on. I've handled a few but have never owned one. Have many friends over the years who swear by them.
Since Benchmade was brought up, I'll say, I think they're about the best damn production knife on the market. My carry knife that's really more for show than anything, is a first generation balisong, made well before they became known as Benchmade. It's more for show simply because it's an antique (or close to it) and one of the first models made. They still honor the warranty, but that doesn't mean I want to beat it up.