I'd stick with a SAK... Check out a One Handed Trail Master.
Still a single hand operation with the added tools for most daily tasks. I use the locking screw driver a lot, keeps me from using the blade to pry on things I shouldn't.

If you simply must have a single blade... any of the brands you mention are fine. I would recommend checking them out in person before buying, they always "feel" different than they look in a picture.