The only Colt I ever handled was an older Blued 6" Python...all I can say is WOW! But they are very expensive.
That said, of the brands you list, I would go with a Smith and Wesson. I used to have a 4" 586, and I kick myself for having sold it. That 586 just felt like it belonged in my hand (as did the model 67 .38sp I had at that time). Unfortunately, most of S&W's blued guns are currently out of production (then again, I like the older guns anyway, without the internal lock, so I would look for a used model). Currently I have a Dan Wesson model 15, and I'd recommend you check them out, but they aren't on your list of choices. That's just my personal preference, nothing against Colt or Ruger. Good Luck.