Hi,

check out the Fallkniven A1. It's IMHO one of the best survival knives around. I own it and it's a beauty. With this there's no need to carry a strong folder in the field, a multitool (my favorite is the Leatherman New Wave) will suffice.

In urban areas I exchange the Fallkniven with my CRKT M16-13T(itanium). But I think actually I'm falling in love with some extremely tough folders from Strider and Extrema Ratio.

Personally I have no need for a Kukri or Machete so I can't comment on this.