I bought one of the Ontario ones a few weeks back and had to return it, came banged up, I'm not entirely convinced it wasn't the shippers fault but I am sure that every KaBar I've bought so far has come in great shape and they do just about anything. As far as the sheath is concerned, sheaths never last forever and I'm still on my first one with my two KaBars so I don't think there's any real quality issue.
Here's a picture of mine:
From top to bottom.
1. Ontario Spec Plus, this one came in good shape, a leather handled one didn't
2. Krayton Handle KaBar, Combo edge, has seen a fair amount of use
3. Leather Handled KaBar, plain edge, has seen A LOT of use
4. Brand new KaBar Leather handle, it's a gift for someone so it hasn't seen any use, that's what they all look like out of the box.
And here's what the handle on the leather handled ontario looked like right out of the box, again not entirely sure whether this is a factory problem or if it was caused by the shipper, I'm sure it wasn't caused during shipping though. There were other problems with it too but this was the most noticable.
EDIT: here's the thread about this problem http://www.bladeforums.com/forums/showthread.php?t=688141
I will say that the KaBars have much better fit and finish than the Ontarios do, but if you got a good one, I'm sure the Ontario would perform just as well as a KaBar, the Spec Plus is great, about on level with the KaBars and fifteen dollars or so less.
