I bought a brand new M19 with a 4" barrel just before all of the S&W BS hit. It was a horrible piece of junk. The blueing was different colors on the cylinder than the rest of the gun, and scratched right out of the box. The bore was off center in the barrel. The timing was also off. I sent it back and S&W did reblue the cylinder, and screwed a new tube on it. The timing was better, but not perfect. After that it did shoot OK, but I never did feel comfortable with it. Traded it for a Browning BPS Trap and an old 10-22. Sold them both and made about $75 on the deal. NEVER will I buy another current production S&W. The old guns are absolutely awesome, but they make junk these days. I look at them occasionally to see if they are getting better but I have not seen it yet.
A ruger GP100 4" is the most accurate handgun I have ever touched short of the single shot guns. I sold it with option to buy it back. If it were not so heavy and a poor double action triggger pull it might have stayed with me.
I have 2 blackhawk 357's, both are very accurate and solid. Not a good carry gun, but outstanding shooters and good value for the money.
My advise is to hold out for an old smith 13, 19 or 66. The K-frame is what a 38/357 should be in my mind.