These are all great choices! Personally I support the Tenacious (full serrations). I am about to get a Rat-1 myself after hearing all the good reviews about this knife that is at such a great price, plus they are not longer being made, so grab one while you can! Both should run around $30. If you want the new black bladed tenacious, it will be a few more dollars (~$45). I would also recommend the G10 Byrd Crossbill (fully serrated); it is a great size, very comfortable to hold, solid lock up and damn cool looking.