The majority of the guns mentioned in this thread may be fine for pocket carry in jeans or cargo pants but not dress slacks. I have a beautiful Model 60 snub but you can forget putting it in a pair of dress slacks and call it concealed, no matter the holster. If you want a pocket gun for dress slacks the options are
Beretta Tomcat
Seecamp's
NAA Guardians
KelTec P3AT
R9's
The majority of the above can be had in 32 and 380 while the R9 is a 9mm I believe it is to much gun in to small a package. I have two of the Guardians, one in 32 and 380 and one of them is always with me. Well made, Solid SS, accurate, the slightly larger size over the Seecamp help to reduce recoil, and the finger extensions help with larger hands like mine. You need to look at some of the hotter SD 380 ammo now being made by Corbon, Double Tap etc... not sure there is a huge difference between them and a standard 9mm out of such a small barrel. All of the choices above will disappear in a pair of dress slacks.
NCH