FJC and the Doctor have pretty much described my own situation. If circumstances and mode of dress permit, I will carry two weapons. In the best of worlds, the "primary" will be my customized and treasured Colt 1911-type .45 carried IWB, with a pocket pistol as a "BUG." My own circumstances these days, however, usually limit me to carrying one concealed weapon. For me, that means a pocket pistol. Until the Rohrbaugh came along, my pocket pistol for the past four years or so has been my NAA Guardian .380 with its tritium night sights. Now, I consider the R9s to be my primary pocket pistol. I must admit, though, that when I am venturing out at night, I am apt to slip the Guardian into my back pocket (holstered in RJ's classic BP design) as a backup to the R9s. (I can't really say whether that is due to the Guardian's night sights or simply due to nostalgia for a weapon that has served me so long and so well.)
RS