LeeG,
Not to hijack the thread, but there are LOTS of ways to carry a firearm concealed in normal work clothes.  A whole coursefull (I teach one).  PM me with what you wear if you want some suggestions.
As for the EDC knife, I also have Cold Steel Tanto's and find sharpened crowbars not necessary for most uses (some military, police, underwater and EMS exceptions).  My daily carry is a SAK, usually an Executive (for the scissors, toothpick and tweezers) and a good folder.  A multitool (SpyderWrench) is in my case.
Respectfully,
Jerry