Which ds lite armor case has the best protection to prevent cracked hinges?

metal case


http://www.amazon.com/gp/product/images/鈥?/a>





plastic crystal clear case


http://www.amazon.com/gp/product/images/鈥?/a>





travel case


http://www.amazon.com/gp/product/images/鈥?/a>





please tell me which case is the most protective and most best to prevent damageWhich ds lite armor case has the best protection to prevent cracked hinges?
Here's one:





http://www.amazon.com/Nintendo-DS-Lite-Nerf-Armor/dp/images/B001EYUV4G/ref=dp_image_z_3_0?ie=UTF8%26amp;s=videogames%26amp;img=0%26amp;color%5Fname=3