A good argument could be made that the Ruger S/A .22's are the strongest, most reliable made. 22 S/A's by Freedom Arms and USFA might be a little more accurate, and better finished. Also 4 or 5 times the price...
I have several Single Six's and a Bearcat. For any kind or serious use, get the Adj. sight version. My fixed sight Beracat hits point of aim, but thats rare, and nothing is more fustrating then a gun thats off, especially if you want to hunt small game.
I have the extra .22 mag. Cyl with one of mine, but seldom use it. Ammo is more expensive, big increase in muzzle blast, for a rather small gain in performance, not to mention a little less accurate, at least in my gun. Still, it can't hurt to have it,,
Barrel length is a personal choice. For just carrying, random plinking and small game hunting, I like a 4 3/4 - 5 1/2 inch barrel (carries well on the hip) For serious small game hunting, where accuracy and "hit ability" is important, then the Hunter model, with its easy scope mounting, would be my chioce. It's amazing what a good .22 revolver can do with a 2 to 4 power scope mounted.
Larry