I prefer my 3 inch SP101 fed with good old (stuff from my dads 1970's stash) Federal 125 gr hollowpoints. Those are downright nasty and evil. When lightly dressed and the wife complains that it is too noticable, I go with my little KelTec P3AT with Corbons.
Carried an LCP for a couple months. Could conceal that thing absolutely anywhere but wanted more bang.
Currently carrying an XD9 subcompact. 14 rounds of 135gr+P goodness in a very concealable package. That's more than double the capacity of a PM9 which was my next choice and much easier to shoot. Add a 16 round extended spare mag and I've got more than enough than I would ever expect to need. Have no problem concealing it in a Galco KingTuk even in shorts and a t-shirt.