I'd go with the Candiru, or Runt. I've got both, and they're nearly identical in blade shape and overall length, but in hand they couldn't be more different. The Runt has a more hand filling grip, but will most definitely carry larger in your pocket. The Candiru, while slimmer, feels more nimble to use. Pair it with their production scales and an AZ Welke sheath, and it will disappear in your dress pants front pocket. I've been carrying mine with a simple cord wrap lately, and it's super slim and light. The Pocket Bravo, while gorgeous (I've got one in iron wood) and certainly won't scare your co- worker because of it's classy finish and size, may be too small for you if you want a four finger grip, it' definitely a three finger knife. Btw, it gets swallowed whole in an Allegheny, you need a lanyard on it, or you'll have to shake the sheath upside-down to get it out, never a great idea.
My 2 cents
~Jim
