Having owned (and carried) Springfields, Rugers, and Glocks, I can speak to several of your possible choices. First, as KevinD said and SR9 attested to above, with the right gear you can conceal almost anything, and do so comfortably and confidently. I've carried a full-size 1911, 3.8" XD(M), 3.3" XD-S, SR9c, and Glock 19 and 26. I have consolidated to 9mm for those reasons listed above and more, and my EDC now is the 4" Glock 19. I don't own Springfields anymore, although I still do love them, but have consolidated down to the two Glocks, and a couple of Rugers (the SR9c... which is a great firearm... and soon an LC9, although this is planned as my wife's EDC). I never liked the way the S&Ws felt in my hands, so I can't speak to the M&P line or the Shield. The Springfields are incredibly soft shooting guns, and IMHO, are very well-built. I just couldn't see keeping them around with the Glocks, which seem to now fit me better (and my wife), and you can't beat the simplicity or the reputation. For the price ($400 OTD at my dealer), please check out the SR9c... you'd be hard-pressed to find more gun for your money, and you get a flush 10rd mag with a 17rd backup in a very concealable package... accurate as hell, feels very comfortable to carry and shoot in my hands, and seemingly won't die no matter what people try to do to it... and hey, made in the USA. In the end, it's a very personal choice, and I can't tell you what to get. You need to see them, feel them, and shoot them (hopefully you have some place that will let you). Just know that size isn't the end-all-be-all, as you can hide anything if you do it right.