Another reply from the gun-owning peanut gallery...
I think the best all-around for plinking and possible concealed carry would be the G19/22/32 mid sized glocks. The 19 would probably be best because of the cheap ammo (Wal-mart, as much as I dispise the place, sells 100rnd boxes for a little over $9... it doesn't get much cheaper than that.) Glocks are also relatively cheap to buy, as well (well, compared to Sigs and Kimbers, which were the other guns I was thinking about mentioning). Getting a 22 or 32 would allow you to shoot either 40cal or 357sig with just a barrel change as they can use the same magazines. 357sig is basically (not litterally) a 9mm bullet in a necked down 40cal case. It supposedly has the same ballistics of a 357magnum being shot out of a 4 inch barrel. I own a G32 and love it, but a few hundred rounds at the range would leave your hand a little sore.
I know a couple people that have the 9mm rugers and love em. My next gun is going to be a Sig 220. If you want a DA/SA type gun, I don't think you can get a better trigger than what comes on a Sig. Smmmmmmooooooooooooooooooooooth. Much better than my 92FS (which yes, I do love

)
For a real concealed carry, take a look at a Kahr P series gun. They are incredibly small and, though I had heard of some reliability issues when the first P40s came out, are a very reliable gun. The 40cal holds 6+1 in the chamber and you hold the whole gun in the palm of your hands. Recoil on it is a beotch, though. The steel framed K series is a little better since it's heavier than the P series.
I could go on and on...
Need to pick up a trip so I can get that Sig, though I do need another O/U shotgun so my friends don't have to use my Browning when we go do Sporting Clays!
Man you'll never have enough guns..... it's a disease...
