I have the original leatherman, leatherman supertool, leatherman wave, leatherman micra, leatherman pulse, sog crossgrip, and an SAK multitool.
My favorite: the pulse. It's lighter than the wave, sak, and supertool. It has a more solid feel than the wave (much like the original and the supertool), it has scissors, it has rounded corners on the handle and most importantly, all the tools lock. The SAK multitool is awesome but I don't like the the slightly rounded corners on the flat screwdrivers (a very minor complaint) and it's too big for me to carry in my pocket. The pulse is "pocketable" (and it's in my pocket right now).
If you want the most tools, get the SAK, wave, or supertool. The wave and the newer SAK have scissors, if that's important to you. Of those three, the wave is more "pocketable" but the fit and finish on the SAK is unsurpassed.
I've left out gerbers, etc. I know a lot of people like gerbers. Last time I took a close look at gerbers was about 4 years ago and concluded then that they were essentially junk. Poor machining and the flat screwdrivers were incredibly rounded. But in the past 4 years I've heard a lot of good things about them. But, can't say myself. However, you can't go wrong with a Leatherman.
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Hoodoo
I get some pleasure from finding a relentlessly peaceful use for a combative looking knife.
JKM
[This message has been edited by Hoodoo (edited 11-28-2000).]