Irish,
I'd vote for a K-Frame S&W because...well, I'm biased.
For a fixed sight model, either the model 13 (blue) or Model 65 (stainless). These normally come with a 4" barrel, but S&W made some with 3" barrels, but they are fairly hard to find. Seems lots of CCW folks snap 'em up.
With adjustable sights, a 2.5" Model 19 (blue) or Model (66) stainless. There are 3" versions available, but the 2.5" is more common. Besides, they look nice too.
S&W Model 19
Stainless wears better in a holster.
S&W Model 66
Both of these guns are now out of production, unfortunately. The Model 686 is the replacement, however they are slightly larger and heavier. Used Model 19's and 66's can often be found for under $450 depending on where you live.
Re: Ammo selection
The problem with the K-Frame .357 was that
heavy use of 125-gr .357 Magnum loads was linked to cracking of the frame just underneath the forcing cone. Two reasons are believed to be the cause of this problem. First, the short 125gr bullet leaves the case a fraction of a second earlier than a longer bullet, with less stability and a longer period of hot high pressure gas behind it. Second, the shorter bullet isn't quite stable as it makes the jump from cylinder to barrel and it strikes the forcing cone with angular force. Compounding this problem is that 125's are moving faster than a heavier bullet, imparting more of a blow. This repeated hammering, after time, causes enough stress to weaken the frame until it cracks. The solution is a longer bullet (heavier) that is moving slower and because of its length, is more stable leaving the cylinder. Or one can use 125-gr bullets loaded to lower velocities than the nominal 1500 fps (6") used in defensive ammo. The good news is that there are excellent choices to replace the 125-gr bullet, such as
Speer's 135-gr Gold Dot (Short barrel) load, Winchester's 145-gr Silvertip and the more traditional 158-gr loads.
I think the problem has been, largely, overblown even though it exists. I was largely seen in police issue guns when training policies forced officers to practice with .357 ammo instead of .38 specials and thousands of rounds were fired through the guns.