The Best Armor is actually down to preference this time around.
At some future point I will try to see what the armor rating actually means, but for now it just shows which one is best. Light armors like Padded and Military Armor increases stamina costs while in use at a reported rate of Armor Rating is a rough rating of how good the armor is. Quality also matters significantly less now as the only thing that changes from lowest to max quality is the durability and as that degrades it comes at no cost to protection anymore! The only thing that affects the damage you take is the helmet, chestplate, gloves, leg armor and boots.
Weapon Mods Alpha Armor Armor has actually been drastically reduced in complexity from A16 to A17 which is a very welcoming change.