I think the biker leather will show the least amount of wear. I would say the metallics will show the most. I know, I have a red metallic and a bronze metallic and the color kind of rubs off on the handles. I have a smooth leather Rhona and it shows scratches, but I've had it for several years and it still looks really good.
I love the biker leather, but I don't know if its available in the Maddy or Mahala?
I agree with you on the metallic, although extremely beautiful I don't think they would hold up well for someone who is careless with their bags.