What I currently carry concealed is based on what I am authorized to carry by my employer. The criteria they established was based on reliablitity and accuracy, and to some degree magazine capacity, not concealability. In my opinion, the first and foremost consideration with a concealed carry handgun is its reliability and how accurately you can shoot it. You have to go out and see what works for you. Some of the smaller semi autos have a barrel length advantage over a five shot (while being comparable in overall size), aren't necessarily more reliable. Five shots, while reliable, are not fool-proof and take practice learning how to master. The myth that a revolver doesn't need much cleaning and maintenance has caused a few revolver shooters to suffer embarrasment and grief. Personally, I would take a J-frame .38 Special over a little .380 semi auto. The super compact 9s and 40s are interesting, but just about all of them that I've seen require a break-in period of 300-500 rounds that usually don't seem to plague the full sized,compact, and subcompact Glocks, Sigs, M&Ps, Springfields which spoil us by being reliable out of the box (with proper lube, of course). A revolver isn't dependant on a break-in per-say, but you'd better make sure it shoots before carrying it, and shooting and dry fire will smooth out the trigger. Handgun concealment depends a lot on gun leather. I usually carry a full sized M&P 45 in a Milt Sparks SSII, held up by a Milt Sparks gunbelt. That works well for me. There are other good holster makers out there who offer good stuff, although it will cost you and you may have to wait a while to receive it. My bottom line, there is a place for a short barreled revolver and a place for a super subcompact semi auto. With either you must train and learn to master. You must understand the advantages and disadvantages of each one, and overcome the disadvantages with training.