If he hasn't already, I'm sure Jeff will chime in here and tell you that it's all BS and you don't need one.
But if you decide that it's not all BS, and that you need a knife of some sort, then here goes:
ESEE knives are well-made, without being extravagant, and will do what they are designed to do. That's reason enough for me.
ESEE knives have the strangest and most wonderful warranty I know of. I won't attempt to recite that warranty here, except to say that if you break it, they appear to simply replace it. They will make fun of you if you do something stupid though, and they will likely do it in this forum. They are kind enough not to mention names.
The people that run ESEE knives seem to avoid the ridiculous marketing and posing that is so rampant in the industry/gear culture, which I find refreshing.
All of the ESEE knives I've purchased have been made in the United States, and I like to pay money to people in this country whenever possible.
SP