Smith or Ruger, can't go wrong as long as it's in .357 Magnum. Colt's don't suck either. I think the S&W 686PP is the one with the "PowerPort" I believe it's a seven shooter too. If you don't plan on carrying the pistol, I'd definitely go for the six inch tube as they make it easier to shoot due to the longer sight radius. Good luck and welcome.
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TJS
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TJS