How about a 3" Ruger GP100? Tough as nails. Heavy enough to shoot all day long, yet you could still CC it in the future with a good holster and belt. Also, with the compact Lett style grips it is pretty easy to conceal as opposed to the ugly bulky Hogues that now come standard on it. Here is a pic of mine with compact grips:
And here is an awesome vid of Hickok45 putting one through it's paces.
And if the GP100 3" is too big, then I would def. suggest a 3" or 2.25" Ruger SP101 in .357.