Before i sound like a major douche, Speedy asked me over PM to state my opinion, so i will now talk out of my ass. Edit: state opinion is more of a if i liked, but now it's this
I'm not going to decide what the best knife for you is, buy what you like. If i had the option of carrying whatever i wanted i would go with this:http://www.blackhawk.com/product/Crucib ... 681,37.htm
Has a trainer for use in SD so there's carryover between the two systems.
Cheap enough to be replaceable. Utility first design which can also be used for self defense. Tip down carry option for opening like this (SD again):
Again covering SD and utility with carryover between the two.
Alternatives for you work tools could be the leatherman micra which has scissors. Fits in the watch pocket on jeans. I don't have the folder (illegal here) but i'd say you could fit both in one pair of jeans. For work you could probably fit a penlight, a cell phone and some sort of screwdriver in there as well for light duty (if that exists) work when you're not carrying the backpack.
Above is what i would have liked to know if i were you i think.
What you have look like great choices. Many people like the juice (i have the kick and the micra) and Benchmade tend to get good reviews as well. I wish i could have something like that.