How does the white iPhone hold up in the long run? Is it more prone to showing its age in the long run compared to the black model? I have had black iPhones all along, and want to get the white one for my next, but only if it doesn't get faded easily or start showing the usual wear and tear faster. Please share your personal experiences. I am especially looking for insight from people who have had the white iPhone 4 from earlier this year.