An old S&W Model 10 has the sweetest trigger of any of my revolvers. I like the heavy barrel model. Buffalo Bore makes some nice anti-personnel rounds in .38spl; hot loads and low flash. A 357 is nice, but you can suffer on followup shots, and the flash can ruin your night vision for a little while.
Did I mention a nice used one will not break the bank?
I'd love to find a used Ruger GP100. But will probably go for a new one if I can't find a used one. The trigger looks like the size I'd be looking for.