More important? That's a very debatable subject, and not exactly helpful nor on-topic. Considering the number of tasks you can accomplish with a khuk (not to mention, being nominally more able to defend your food, water, and clothing), it would be a very useful thing to have in a tight spot. Your food, water, and clothing aren't going to mean all that much if zombies eat you. Or people pretending to be zombies, for that matter. Not really sure what you're doing on BLADE Forums, if you don't think that carrying a BLADE is a useful thing.
The BEST one is the one that you are most comfortable with though, in my opinion. There's a khuk out there for all tastes, styles, and needs.