It's even simpler for me. My **** just doesn't scratch, because I treat it good. What on earth do you guys do to computers that make them scratch and dent? Just take good care of it and nothing happends.
The reason the pro laptops are aluminum is because they let off more heat, and aluminum lets the heat out more efficently than the bullet proof plastic or whatever.
I'm planning on getting a macbook pro soon, and if it ever gets one scratch or dent, I will give everyone on this site $1000. I'm not kidding. I just don't let my stuff get damaged. I'm a responsible guy.