I'm going to give you advice. I know it sounds badass to baton wood and hack away at saplings and vines with a fixed blade, but it's just not that practical. Yourr better off getting a medium sized axe or a hatchet, then a fixed blade for smaller tasks (I suggest swamp rat or tops b.o.b.) and Maybe a secondary knife, like a Mora, or a solid large folder.
Funny how whenever someone asks for a good survival knife, he inevitably gets told that this isn't what he should want, and is then offered a lot of things he didn't ask for...
If I have any advice to give, it woud be to stay away from the current fad for full tangs, and keep debilitating vibrations away from your hand with either stick tangs or, better yet, a good hand-filling hollow handle... Of note is that TOPS knives are kind of an exception to this, because they have unusually tightly made and very high quality "dampened" micarta full tang handles (and their idea of 3/16" is much closer to 1/4"...), so they kind of vibrate less painfully than most others, and shouldn't be dismissed outright on that basis... Their full tangs still take their usual pointless toll in severe handle heavyness though, another major reason to avoid full tangs (similar to most hollow handles on that issue, but minus the chopping confort and secure storage)...
The BK-9 performs very well for the price, has an excellent sheath, is handle light because the full tang is "hollowed out", but it is kind of hit and miss in blade straightness, unless I happen to have the only slightly curved one of them all... No practical effect, but not what I'd call high quality/pride of ownership-inducing... Just good rough utility value for a very low price... The rough paint finish is extremely solid, but your blade is harder to clean when it picks up crud...
The BK-9 has one of the worst full tang vibration "bite" of most knives I have chopped with (probably due to the hollowed-out tang), so if you can spare a bit more money, by all means go for a Cold Steel Trailmaster or a Recon Scout (I hate their new plastic sheaths though). I'll go on a limb for something fancier, and recommend either the Fallkniven Odin, or especially the Thor, but avoid their old beige sheaths which scratched the daylights out of the blades... The new black leather sheaths appear to be much better in every way, with a correct cross-guard snap, and not the silly non-functional previous design. The Odin is a lot shorter and easier to carry, and is a sort of compact Trailmaster.
Gaston