I'd go for a Mora Kansbol, considered by many to be the best Mora of all - more versatile than the Garberg which is mostly a wood splitter. Way more slicey so better for food prep, gutting, and just buttering sandwiches. Also less costly, it leaves some budget for other stuff like a decent little saw (say a Silky F170), the latter being extremely useful for things like shelter building. For a 14-year old I'd not go for a very large killer blade, best educate him to the use of the knife as a utility tool.
If you want something not Mora but similar, the Hultafors OK4 is a nice compact belt knife, very tough (SK5 tool steel), black finished blade, sheath with a firesteel loop (get him a fitting firesteel with it and you will have a real 'survival' package). Also it won't scare other people when he is out in the woods. Lots of money left for some additional items to get him a crafty kit. Maybe a Victorinox Farmer to accompany the fixed blade (great awl, sawblade, alox finish). Between the Vic, the OK4 and a firesteel he'd be able to survive being dropped in the Canadian wilderness like in 'Hatchet'... ;-)