Tom,
Look into the SOG Twitch II. I have had one since they first came out. Very nice and holds an edge well. Very sturdy, and with the clip removed, you won't even notice it in your pocket. I also have one in my DR PSP's and it fits great. I would add a link, but I am on my iPhone and it's a pain.
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I do the things that I must, and really regret, are unfortunately necessary.

RIP OBG