What you might find as you learn to use a "full-size" survival knife, is that such a tool is vastly overrated on the internet.
There is little that amuses me more than when I see someone in the back country lugging a 10" chopper that is made out of the flavor of the month steel and micarta, and sometimes sports a camo-painted blade. Thankfully, these sightings are just above Sasquatch level. It's like seeing someone carrying a cast iron stove "just in case."
I have personally found that carrying any knife that is over 4.5-5 inches in blade length is just lugging more weight for no apparent return in capability.
What if I have to chop? Well, it is exceedingly unlikely that one will have to make an improvised shelter via chopping up the wilderness, but even if one does find the need for such a shelter, a decent folding saw is going to be lighter, faster, more precise, and a ton cheaper than the superknife.
From fuzzing sticks, to cleaning fish, to making a digging stick, or a frog gig, a trap, on and on, a handy knife that is sharp and easy to resharpen is going to beat the daylights out of a quasi-machete or seven inch combat knife.
This continent was opened up by mountain men using carbon steel trade knives that were rarely larger than six inches in blade length.
For centuries, 2.5-4 inch thin bladed puukkos with generous handles kept men in Scandinavia alive in one of the most unforgiving climates on earth.
There isn't a $40 "full size survival knife" out there that would be my first choice for a backpacking blade.
http://www.ragweedforge.com/SwedishKnifeCatalog.html
About any blade on the above page would fill the need for a serious survival knife when coupled with a garden variety folding saw. If you trust yourself, get one without a guard, if you don't, get one with a guard.
Just don't get sucked into the "fact" that you "need" a "big" knife in the woods. If you need a weapon, make a fire hardened spear. If you need a building tool, carry a small axe or a folding saw. If you need a bushcrafting knife, carry one, not a machete or a man-killer.