I am considering purchasing a new .22 pistol for some economical but serious target shooting. I have an old Ruger Mark I and a Colt Huntsman. However, it's time to get something new in the rimfire area. I would like to stay under $500 or so. Consequently, considering a Ruger Mark III with the bull barrel. However, I just noticed the Smith & Wesson Model 22A with the 7" barrel. Frankly, I love my MP 9mm and I like the fact that the 22A has a rail for some after market sights. However, I have not met anyone who owns one. Any and all thoughts and input would be appreciated. Preferences? Reviews on the SW? Comparisons? Other makes to consider in this range?