Hmmm. A difficult choice. I haven't had the chance to own any of these fine knives yet, but all have received excellent reviews. Since I have plans to order a Martindale in the next few weeks, I guess I'll choose the golok of the four.
Currently, when I'm in woods, I usually carry a 15-18" khukuri, made by either a Ghurka House or a Himalayan Imports. These knives are up to the tasks of light to moderate chopping and light splitting (or heavy splitting, depending on the model). Most of the chopping or splitting I do is recreational (I carry a stove, so the fire is just for fun). I usually back this up with a folding saw and some type of light, sharp knife for more general work, like and SAK, leatherman, or mora. I wouldn't feel too naked with just the khukuri if I lost everything else.
If you have lots of underbrush to cut through, it's hard to beat a machete. In a pinch, a golok or khukuri will also serve for brush cutting.
Patrick