I have a 586, 686 and a 625. All 4" guns, love them for shooting, the lug adds weight to them that is great for D/A shooting. I also have a 6" 17, it weighs a ton. Great for shooting with both hands but I gotta do some weight training before I can use it with one hand. I wish I had a 4" 17, guess it's on the list.
Note: for a holster gun I'll take a 15 or a 19.