I used to carry a Kel-Tec P3AT for years as an OD/BUG piece. I shot it WAY more than it was probably ever expected to be shot and while it is still functional, I had to modify the take-down pin to keep it from walking out under recoil (this was after years and many, many, many boxed of different ammo). So, I retired it and searched for a handy replacement. Like you I narrowed my search down. You've found several great ones to choose from and have gotten some good advice. So, my $.02 is this: I shot a friend's Kahr P380 (the, at the time at least, ridiculously higher priced version of the excellent CW380), found it to be outstanding, then got a great deal on a NIB Kahr CW380 and haven't looked back since.
I found during my first range session with that Kahr that I was getting 2 kinds of malfunctions: Ammo related and Shooter Induced. As for the ammo-related troubles, the solution was simple: Don't use steel-cased ammo, at least in mine. There, problem solved. As for the rest, I traced that back to me shooting it like a full-sized duty pistol. That is, the "correct" 2-hand grip. Depending on the 2-hand grip you use, you can actually provide less support for the backstrap and this lets the pistol move more under recoil. You won't feel it, but it'll happen and it only takes a little movement to reduce the amount of energy going to the slide. For 2-hand holds, the old cup-and-saucer hold seems to work well. But these are really designed to be drawn and fired one-handed. I mean, c'mon, it's a last-ditch, get-off-me, save-your-hind-end piece, not a high-zoot competition piece. I have yet to get any malfunctions shooting it one-handed. Also, do what the manual says and load the first round by locking the slide back, inserting a mag, and then releasing the slide. For at least the first few hundred round that will ensure you don't slip and not pull the slide back far enough. There really isn't much margin for error on these tiny guns of any make.
The sights, unlike the ones on many others on micro pistols, are actually surprisingly useful. Mine has fed ball and hollow point of many varieties equally well (just no cheap steel-cased stuff unless you want practice clearance drills ever other mag or so).
It's light enough (as are most of the others) to be carried in the pocket of pretty much everything short of pajamas (I guess...?). I make a 1/2 shell from kydex and backed it with a rectangle of leather that hides the outline. This takes up less room in my front pocket than a wallet and is almost unnoticeable in most pants I wear. Spare mags direct from Kahr can be a bit pricey (haven't priced them in a couple years) but I found factory mags from online sources for around $25. I use an old coin/card wallet to tote 2 spare mags (like I'll have time to change mags, but it makes me feel better).
For practical accuracy this is, IIRC 6 rounds from 7 yards:
This is, I believe, 3 magazines from 15 yards: