My vote is for a good, used Dan Wesson M15-2. Smiths and Rugers are nice but they don't allow you to change cylinder gap, barrel lengths and even barrel twist rates. The DA trigger takes getting used to (a polish job and springs help) but the SA trigger is superb. Several different sight options are available as well. These guns were successful in silhouette shooting before the SuperMags were introduced due to their inherent accuracy.