It doesn't matter what you get. Once you get your second gun there will be a third, a fourth, etc. It's like a drug and there is always something missing/better/more task specific needed.
You can't go wrong with a snubby, but it depends on what you want to do with it. You mentioned carry and while I have and like the Ruger SP101, it's pretty heavy. I have a Taurus 85 .38 with the enclosed hammer for carry. It's perfect for going for walks and the like since it's so light. For the range, I like to use a Ruger GP100 with a 4" barrel. It's a cream-puff with the light loads I make up for it.
The one thing I'll mention is that the SP101 I have had a rough, heavy trigger when I first got it. Dry fire it roughly 50 to 100 times to work the internals a little. Then open her up, polish the parts that appear worked and install a set of Wolff reduced power springs. Makes for an awesome gun and it's easier to do than you might think. I'd never done it before, but it's easy to figure out and only took an hour or so.