If you can find one, i'd go with the "Power Port" Edition, I had one and let my uncle borrow it. He gave me a check instead of my 629 back lol.
The "Power Port" edition, is where the front sight is and inch closer to the cylinder and the front inch of the barrel is ported on the top to help...
I have to agree with everyone else. I own a 686-3 4", best shooting revolver i've ever owned. I've shot the gp100's and they just don't fit my hands very well and not a big fan of the sight set up on them. I'd go with the 686 most Definately.
S&W's are more expensive in MN, i paid $805 for...