It will be pretty split on this issue, I think. That's probably because it's comes down to personal preference. From a practical standpoint, I think it's hard to argue that generally people can shoot better with a scope. Aesthetically, I don't think a scope adds much to a lever-gun, but guns are usually used to shoot, not to look at. At most distances you will shoot with your .357, both sights will provide very good results, provided you can see what you are shooting at, and this is where the scope pulls ahead, especially in low light. My eyes are still pretty decent, but the scope gathers light that a peep sight won't. If you are hunting this is significant since you will likely see deer in early morning or in the evening. I put scopes on my levers, but I drew the line with my 1894 cowboy model. It has a tang mounted peep sight. If you shoot better with the scope, I say go for it. You might want to look into a scout scope setup, as they carry a little better.