I have several of different varieties, but my favorite and easiest for me to shoot is a 1949 vintage Colt Woodsman Match Target pistol equipped with a set of target stocks by Lew Sanderson. In case you haven't heard of Mr. Sanderson, his grips are right up there quality wise with the Roper grips! A picture:
The Colt Woodsman
The correct magazines for this gun
The only downside to using one of these is the cost of the magazines. They are currently going for $150-$175 each!