Nice gun, nice pic Chris!
Mas... The SP is a wonderful little blaster. I have the 3"er and it's my "grab it" gun when I want to take some power and not worry about dings, scratches, whatever... toss it in the glove box, under the seat, tackle box... great, reliable, potent gun that you don't have to worry about keeping really "nice" as you might want to do with some other models. (Not that I don't take excellent care with mine... I just don't worry about it either.) But this gun is no good as a pocket gun... too big, too heavy, too "catchy".
Do you want a lightweight or a solid weight? Exposed hammer, bobbed hammer, or internal hammer? .38 spl +P or .357? Lots of options to consider.
That said, for me, I would prefer a S&W 640 for a small concealed carry .357 (internal hammer, solid weight) and already have a 642 for small, light weight .38 spl +P. I've wanted a 640 for a very long time and will have to get one someday!
I think when you get down to true pocket size revolvers, the internal hammer configuration (642, 640) is the best choice. Slick profile for no-snag pulls, always DA for consistent drills with it, and can be fired through a coat pocket if necessary. .38 +P is ok in a lightweight (642), but for .357 I would choose the solid weight (640) over the light weights.
The heavier-duty SP isn't quite there, though the bobbed hammer model gets close.