I don't know that the endurance package is of much, if any, benefit to the Model 57/657. The Model 29/629 (44 Magnum) seemed to have issues with the cylinder stop unlocking and allowing the cylinder to rotate under heavy recoil. The 41 Magnum produces significantly less energy than the 44 Magnum and not likely to have the same issues as the 44 Magnum. With that said, fit and finish is likely to be better with a pinned and recessed Model 57, but will cost more due to higher desirability. If you just want a shooter, then a non-P&R that is well fitted should satisfy your itch.