I've been reaching for my Benchmade 330s a lot lately. Google returned a representitive pic:
I figure a knife is pointless [edit: haha, I just realized how punny I am] if you can't get to it quickly. That's why I carry a Spyderco Endura, although I suppose any of their others would do well, especially the Delica if you wanted something smaller.
Personally, I use the combo blade in ZDP-189 steel which *REQUIRES* a diamond sharpener. The VG-10 steel would work better if you want to quickly sharpen on a steel, though.
In fact, I've heard some very nice things about Byrd knives--they're the Chinese branch of Spyderco, and the knives feel almost identical in their respective models, at about half the cost.
I'm a little partial to SAK's - one of my, I guess you would call it KAD?