All I can offer is the observation that the Smith 617 is incredible, but most likely too expensive. The bearcat is very small, so I would look toward a single six if he wants a SA.
Not much need to look past this post. No offense to subsequent commentators. To me, this just sums it up. The model 17 is probably the finest .22 revolver ever made if size is no issue. If only single actions are counted, the Super Single Six is probably the best. To me, the 617 is the top of the model 17 line-the pinnacle. If you don't like stainless or extra bulk, the model 17 is the way to go.
Years back, Venturino did a test of single actions. This must've been clear back in the eighties. I can't remember if the Colt Scout came out on top accuracy wise or the Single Six did. Personally, though I've got the Colt, I think the Single Six is the better of the two. They were the top two accuracy wise, in the article, regardless.
