Stamped are really no less durable than milled, and I've heard the milled may have a slight edge in accuracy over stamped, but not sure how much truth there is in that. Milled is slightly heavier for obvious reasons, but not enough to me to make a difference. The milled rifles I've messed with have had smooth actions - whether that's a product of the receiver or just a product of build quality I don't know. Furniture options are going to be far greater with the stamped. I guess it's just a case of personal preference.