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In semi-automatics, I think the Browning Buckmark (in its almost infinite
variety of configurations) and the Ruger Mark III rule the roost.
Both are very reliable and accurate. The Ruger has frustrated a lot
of new owners in the process of re-assembly after cleaning, until you
get the hang of it. But get past that learning curve and its solid as a brick.
Huge after-market support for both the Buckmark and the Ruger Mark III,
if you like to tinker...
Don't like the little Walther -- friend of mine has one, and it's been
pretty flaky. (mis-feeds, mis-fires). It looks cool. I want to like it,
but it just doesn't perform reliably, in my limited experience.
Don't really like the "plasticy" look of the Smith and Wesson semi-auto.
But aside from that, haven't seen much -- positive or negative about it.
Beretta Neos semi-auto. Way too "Buck Rogers" to be taken seriously.
Haven't seen any reports on accuracy / reliability.
Sig Mosquito seems to pop up occasionally, but don't know much about that
one either. Looks pretty cool. Seems reasonably priced. Just haven't crossed
paths with one.
I don't know of any great choices in double-action revolvers. Smith and
Wesson makes nice stuff, but I'm not excited about paying their price tag.
Taurus also makes some double-action revolvers. Hit and miss reports on
quality on those. Maybe you get a gem, maybe your new toy takes a
couple of trips back to the factory for corrections before it works right.
Or -- allegedly -- Ruger is bringing back the Ruger SP101 in .22LR, but that
hasn't hit the shelves yet. August 2011 -- maybe.
If you like single-action "cowboy style" revolvers -- no question -- Ruger
Single Six with the convertable cylinder for .22LR and .22 magnum.
(.22 magnum out of a pistol barrel = not terribly efficient, loud as all get out,
and pukes a fireball out the end that is an absolute blast. :thumb