If your going to carry a gun for self defense I think that you should carry something that has enough Oomph, as you say, to get the job done. I don't particuarly enjoy the prospect of shooting another human being, but if I have to, I want to get the dirty business done as quickly as possible. I wouldn't want to carry anything less than a .380 and than I would want it loaded with hydra-shoks. I'm a personal fan of the 38 special snub nosed revolvers, when a smaller gun is in order. I had a S&W model 36, but I think I'm going to take a look at the Taurus ultralights next. Loaded with five 125 grain +P hydra-shoks it becomes a pretty lethal little package and far better than the mouseguns that seem to be gaining in popularity. As far a concealement goes I carried one pretty much all the time this last summer and nobody ever new. I used either a strong side Michaels of Oregon holster, or one of the Kramer pocket holsters. My only complaint was that the gun was a bit too heavy for pocket carry, hence the reason for wanting an ultralight. If you really want it to disappear try one of the ankle rigs by Kramer or Allesi (spelling could be wrong).