I've only owned one long barrelled Smith, a 29-2 I picked up a week or so ago.
As a Canuck who got into the game after laws changed, I cannot legally own a 4" pistol. I bought this one with plans to cut it down to 4.25" (minimum legal length). I suppose this might be considered heresy, but I have to be honest, a shorter barrel is more appealing to me.
Plus, the barrel is less than perfect with a ring around the outside, so I figure its better than doing it to a flawless example.