I'd go with a 5" clip-point CS Voyager - really, choices are limited in a folder that size, and the CSV will be the most reasonably-priced way to experiment with carrying a large folder. also it's relatively light for its size, and plenty strong. It won't be a tank like the sifu - you could turn a tree into a canoe with that thing - but then it won't weigh as much as a tank either. the clip-point is better suited for most utility purposes than the tanto, because of the belly, and tip-strength won't be an issue with a blade that big, at least not for any sensible activities. I say this having often held but never owned a Big Voyager, however . . .
Oh, also, if you will use the knife ONLY for defense then I'd get a serrated blade, because the CS serrations are VERY aggressive! But if you EVER want to use it for utility tasks then I'd get a plain-edge, because the serrations are nigh-impossible to sharpen - I don't think CS itself will resharpen the serrations, even if you send them the knife.
BUT - see the post on this forum "5" Voyager impressions", where many people gripe about these knives. I think that they are not as high quality as many other production knives, which is why they're better as sod-busting utility blades than as silky, dependable tacticals where smooth action and ease of presentation are of paramount importance. And if I carried one it would be inside the waistband, not in-pocket, because of the slightly lame clips.
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The beatings will continue until morale improves.
[This message has been edited by fishface (edited 30 November 1999).]
[This message has been edited by fishface (edited 30 November 1999).]