I do like the idea of a .22 double action with a 4 inch barrel.
...then for a little more money go over to GunBroker and pick out a nice used Smith & Wesson Model 18...it is a gun that will last several lifetimes...
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=472110074http://www.gunbroker.com/Auction/ViewItem.aspx?Item=472189329I have several that I have used for basic handgun training and there is none better...
Bob