I have been tempted to get a 22 target gun many times., Researched the Beretta Neos, Ruger, Buckmark, S&W, Walther P22, Sig Mosquito, etc.
The Walther and Sig 22s are not that great. Undoubtedly, an owner of one will chime in. But, I have read tons of complainst about these guns. Also, the slides are supposedly made of zinc.
The Ruger Mark 3 is supposed to be one of the best, I just don't care for it personally.
I would buy either a S&W 22A (which is somewhere around the $200 mark) or a Browning Buckmark, which is a little more expensive.