Years and years ago (BK, Before Kids) I used to shoot IHMSA (long-range) metallic sihouette, and NRA (out to 100yds) Hunter Pistol silhouette. Contenders ruled. Great triggers, great accuracy, great sights as issued, and easy scope mounting. I'm down to .22LR, .357M, and .44M, all with scopes. They offer incredible versatility, and I can hunt anything from cottontails to whitetails with the three calibers I've got.
Stick with the bull barrels. I never had any luck w/ my .45Colt octagonal barrel, and I believe the multi-purpose shotgun/bullet barrels give up too much accuracy.