If I am not allowed a multitool or SAK, then one of these in no particular order of preference:
TOPS Border Crossing
http://store.yahoo.com/topsknivesstore/bordercrossing.html
If I was only allowed a smaller fixed blade, then this is the one: tough as nails, small enough to handle all utility, skinning, and kitchen tasks, but stout enough to pry, hammer, use a baton to chop with it. 1/4" thick, 4.5" blade, but razor edge. 154CM, CRYO heat-treated to 58-60 Rc. Fat, contoured, linen micarta handles, small skull crusher, kydex multi-position sheath with rotating spring metal clip. Great back-up fighter, indexes superbly in reverse grip.
Or these:
TOPS B.E.S.T. (Black Eagle Strike Team) 5010:
http://store.yahoo.com/topsknivesstore/bestbe5010t.html
7" blade with 6.25" cutting edge. Same materials construction as above. The humpback shape gives it the chopping power of a big 10", but the handle and balance make it a great back-up fighter. The handle on this one has to be felt to be believed, and the large finger choil makes control during smaller tasks superb. The Tanto version, which I have, feels like a meat cleaver that slides down to a razor edge. With the weight of the blade, I just touched a piece of cardboard nad the weight of the blade, combined with the geometry, made it slide down through so fast I almost didn't catch it on the other end before it hit my leg! Even though it's sabre ground, the ground out area is wide enough to be like a flat grind on most other blades. That's because the whole blade is so wide from humpback to edge. My nickname for this knife is Moby, of course.
Gotta run to a meeting, but when I come back, i'll post about the Simonich Raven, and the Becker CU-7 as well!
~B.