Mike
Brand IMO is less important than the actual quality of the knife but reputable brands are a good starting point.
While I like Doug's knife the axis lock I am not sold on as "I" believe it is too technical (less moving parts is good IMO).
Ducks for cover <img src="/images/graemlins/shocked.gif" alt="" />.
But seriously I have had great luck with the Emerson liner lock folders with never and issue.
For similar money to Doug's knife I plan on EDC'ng the new Swamp Rat folder in the same steel but with Busse's proprietary heat treatment when it is released. I also like the thumb opening hole rather than the stud as cold, wet or gloved hands have an easier time of it.
Of course Busse's life time bumper to bumper warranty is second to none.
http://www.swampratknifeworks.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=10;t=001388;p=1Do your homework and get what is right for you.
Flip