I would like to correct the info on the Glock. The Glock 19 (9mm compact) has the same dimensions as the Glock 23 (.40 compact.) They are essentially the same gun, but the 23 is modified to carry a larger round. For this reason, I would choose the 23 over the 19. When I used to carry concealed, this was one of my favorite guns to carry. It's also large enough to be carried as a duty weapon, and I used it for that purpose as well.

Concealment is an issue with this compact gun, however. I found that you can carry it well on a shoulder holster, but it was difficult to carry concealed otherwise. Perhaps Glock's subcompact line would be a better choice. My issue with their subcompact line is that they're still a little too fat. What I found to be the most comfortable was a Walther PPK (James Bond gun.) It's very slim, light, and comfortable to carry. There are many ways you can carry it concealed. It won't have as much take down power, however.

Let me put another plug in for Glocks. I used to own a Beretta 9mm. I always put it away in my holster in the "fire" position (safety off.) That way, if I ever needed to use it, it was ready to go. One day at the range, I pulled it out and fired it at a target. However, somehow the saftey had worked it's way back into the "safe" position, and with each pull of the trigger nothing was happening. My face went white, and I think my heart skipped a beat. In a real life situation I was now easily dead. Glock's safety is on the trigger. It won't fire unless you pull the trigger. It really gave me a lot of peace of mind.

Glocks are also very durable, reliable, and accurate. My first three shots out of the Glock 23 were at 25 meters, supported. My shot group was about 1 inch apart, 1 inch to right of center, and 1.5 inches below center. Another advantage of the Glock is that with other semi-auto guns, your first round is harder to fire unless you manually pull the trigger back first. Not so with the Glock. Every round has the same amount of trigger squeeze. So your first round is the same as your last. One thing I had my armorer do for me at my department was change out the spring and trigger. Instead of 5.5 pounds of trigger pull, it was now 3 or 3.5 (I can't remember anymore.) He also put in a New York trigger so the trigger travel was less. I found these changes made me more accurate on the range.

A lot of rambling about guns, I know. But I put a lot of thought into it in the past. I no longer carry concealed though, so there could be new information out there to consider that I haven't looked at.