As far as carrying with a round in the chamber goes,
1) It's the only way to fly.
2) If someone can't get comfortable with Condition 1 carry, I would suggest a DAO type.
But of the DAO pistols available out there, I would lean strongly to one that has a visible hammer. This is because if the hammer is down, there's is virtually no way that the gun can go off without someone pulling the trigger.
And the whole process is fully visible to the user.
With a traditional DAO, you have to charge the mainspring with each trigger pull. This makes for a heavy trigger. That's why I like the LDA type. The mainspring is charged by the act of cycling the slide (like some striker fired pistols), so the trigger pull can be light. But at the same time, the hammer is
visibly in the "down" position. So even if the internal (multiple) safety mechanisms failed and the mainspring somehow released, the hammer would not be capable of driving the firing pin forward to light off the round.
Internal striker fired pistols may well be every bit as safe, but you can't
see what is going on in there. So if you have a vivid imagination, you could envision (correctly or not) the internal mechanism failing and driving the striker forward, allowing the gun to fire.
While this may well be just as irrational as being worried about a C & L 1911 pistol spontaneously going off, fear is fear whether it has a real cause or not.
With an LDA, everything is right out there in the open.
Plus, the trigger pull is sooooo nice!
