My suggestion is the Fallkniven F1 as mentioned before. For 250 bucks you can get two (one in your belt and one in your pack as spare) and/or a Gransfors axe or a Laplander folding saw.
My Nessmuk trio is the F1, a LM Fuse and a Laplander type saw (same thing but not green)
http://hem.passagen.se/nodh/trio.jpg
If you want bigger knives you have the S1 and the A1.
Third option is the get an F1 and an A1 and an WM1. One in your belt and one in your pack and one around your neck. Then you will never be without a knife. Keep a firesteel in your pocket and a (unused) urine test tube with a "naked" scout fire steel and some cotton duct taped to the WM1 sheath.
The reason for not spending 250 bucks on ONE knife is not those expensive knives are bad, if you come above 100 bucks you are into the range with "real" survival knives anyway, but if you drop one 250 bucks knife in the river you are toast, if you have two 100 buck knives one might still be with you. Someone on this forum stated the fact that you should always have a backup that is equal to the knife you usually use. If your primary knife is a 4" and your secondary is the 2" on your multitool a three week hike will be quite hard if you loose your knife. If you have a second 4" in your pack you have saved the day.
A survival knife should not be bigger than 4" anyway, then it gets too heavy to drag along all day.
Good luck with your choice. The F1 and the LMF II are developed for the same thing, the F1 for the Swedish AF and the LMF II for the US AF. One thing that really differs in design is that the F1 has the tang come out in the back making it great if you need to pound it into something, the LMF II has the butt cap separated from the blade. The F1 is more developed for "survival" when the nature is your "enemy", it doesnt have "skullcrushing", "stabbing" and "penetration" as its main features.
A "smaller" knife might also not draw attention to you too much. If you are dragging along lots of guns and stuff it might not matter but if you use in civilian life.
The F1 have different sheaths for different uses and On Scene Tactical has great kydex sheaths if you want to carry the knife upside down on your west or need a great "survival" sheath with firesteel holder and such. Neat and streamlined.