You also mentioned the BK5. Have you checked out the BK15? It's pretty much the 5's baby brother. You can get the micarta handles for that for around $30ish I think, which will bring you to your budget of $100. For maybe $30 more you could probably get a kydex sheath from eBay or somewhere else, or you could just stick with the nylon.
http://www.amazon.com/Ka-Bar-Becker...1?ie=UTF8&qid=1398647714&sr=8-1&keywords=bk15
...boy that knife is perrty :love-struck:, I want one myself just by looking at it.
http://www.amazon.com/Ka-Bar-Becker...1?ie=UTF8&qid=1398647714&sr=8-1&keywords=bk15
...boy that knife is perrty :love-struck:, I want one myself just by looking at it.