Interesting old thread, as it started out.. As an Full-Time LEO for over 31 years, I have generally carried (off-duty) either compact (8-15 round) autos in 9mm, .40 S&W or .45. Larger events and bad neighborhoods called for a third magazine & maybe a pocket full of 620 Goodness.
Started P/T job as an SRO for a small private school back in August, retired from my F/T 29 October. New job has changed a bit since then... I'm now to dress very casually (jeans & tucked pocket-tee or polo, etc.), and I'm also responsible for Building Maintenance.
Being in the Mr. Fix-It roll, around a bunch of younger students & their parents (I'm present for sporting & extra-carricular events, as well), I've also considered down-sizing my 'hardware'. Just ordered an 642-1 to replace the 640 no-dash I passed on to my brother a few years ago.
As I spend more time around the larger areas of the school (auditorium, gymnasium, etc.), I'm having second thoughts. Maybe I should stick with the P-239 or 4513? Just that I'm pretty "solid" built, and the wardrobe desired doesn't exactly lend itself to much aid in concealing these "compact" yet bulkier choices.
Since this quandry is in line with the OP's ancient question, I don't feel too guilty tagging my dilemma on to his thread. Any sound advice, based on experience rather than theory?