back to OP
Raindog...
You already have a Glock 26, basically the smallest Glock, so any Glock discussion is not what you have asked for.
You have clearly done your research and have narrowed it down to 5 hanguns. You did not ask for other suggestions (not Kahr, not Baby Eagle, not anything else, etc)
-LCP
-LCR
-S&W Snubbies
-PPK
-Sig 238
You are obviously looking for that "just right" combination of power/concealability.
So here goes....
I would eliminate the revolvers right away (LCR and Snubbies)..they are just to big, at least for me, to conceal effectively. Not much better than what you have in a G26.
That leaves the PPK, Sig and LCP.
The PPK doesn't give you much size advantage, again, over your G26.
Now, that narrows it down to the Sig and the LCP.
The sig is a bit bigger and is based on the old Mustang specs (a mini 1911 if you will). The action is different than what you are used to with your Glocks.
The winner would the the LCP. Not perfect, but meets your criteria.
-Smallest and easiest to conceal of the bunch
-Affordable (at least now)
-Same action as your Glocks
-Fewer issues with the newer ones than the older ones (look for serial number starting with 371xxx, not 370xxx)
-The .380 ammo market has loosened considerably in the past 3 weeks
I have one. I like it. The trigger pull is very long and I don't particularly like that, but it is all a matter of give and take depending on what your priorities are.