Columbia River Knife and Tool's stiff kiss line is really good. they can be found on ebay for about $20, or about $25 at some stores and on the net.
they're AUS-6 steel.
i'd suggest the MDP (modified drop point) because drop points cut cleaner than the tanto blades. the tantos are good if you want a more rugged knife.
i've owned the NECK PECK, it's like a stiff kiss only smaller, and the MDP stiff kiss.
i just got a Wicked Knife Co. Woo neck knife (thanks a lot Gordon!) and it's a great self defense oriented knife, but if you want a very very durable outdoor knife then i'd suggest that. i think you can find the WOO (which is 1095 carbon steel) for about $30 on the net.
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~Fumbler
the crazied knife weilding Sarah McLachlan fan =)