Originally posted by: pontifex
a) i wouldn't trust my life with a less than $50 knife
b) i hope you have or get training to use it
Agreed. I spent just enough time on security (in the Navy) and read just enough books to know I cant possibly know enough. Knives are actually very dangerous to the wielder if he hasnt had lots and lots of quality training. A gun is better for most situations.
Along those lines, if the OP had recieved such training, he would know that there's a reason Marines only go with Kabars. Its not just pride or brand loyalty. When your life depends on it only a Kabar will suffice. Some other high quality brand (read: expensive and well known) might be acceptable if you feel comfortable with them.
But again, that would require lots of training and experience and if that were the case, he wouldnt be asking.
A couple tips from my books and training videos:
Folders and kitchen cutlery are poor choices for combat. They were both designed for specific uses and fighting isnt one of them.
In a traditional knife fight and a traditional knife attack (two very different things by the way) a shorter blade has the advantage.
Only in sword fighting is a longer or larger blade more useful and nobody really does that anymore.