Not-so-humble opinion from die hard pocket carerier
I've toted a load of small pistols: 3 NAA mini-revolvers (1 22LR, 2 22MAG) a Beretta .22 model 21, Taurus Mod 85 .38 spcl Ultralite, KelTec P11, and the KelTec P32 (my all-time favorite) For size and weight, the P32 cannot be touched by any other pocket pistol and supremely reliable after almost 700 rounds.
I'd feel a little more secure carrying a service round: 9mm, .38 spcl, or .40 cal, so I'm seriously looking at the brand-new offering from Kahr. This the MK9 on a diet and weighs in at a scant 14 oz!
I'm fussy and spoiled in that whatever I'm carrying HAS to be light, small, and effective. The KelTec is light and small but somewhat anemic for a self-defense round. My Taurus weighs in at 17 oz fully-loaded but is still somewhat bulky for me. I'd like to consider a S&W 342PD but, good grief, it's practically the same size as my Taurus!
Enter the Kahr PM9! Now, this is a really intriguing little platform; something I'm going to give serious consideration to when they ship this May and hopefully, the polymer frame teething problems will be a thing of the past. Personally, it has the smoothest, sweetest DA trigger of any semi-auto I've ever handled.
I think Kahr is going to be hard-pressed to keep up with the demand for this type of pistol. Check them out at khar.com
PS-I also carry ALL of my guns in Uncle Mike's soft flexible pocket holsters. Why? Again, going back to my original criteria....they are extremely light, very small and inexpensive. When one wears out or loses it's shape I just re-order at their excellent website.
Thanks for letting me share.