Default Case that wont scratch the chamfered edges?

Does anyone know of any cases that wont damage or scratch the chamfered edges? I'm planning on getting either the Spigen Slim Armor http://www.amazon.com/dp/B00J9B4FR0/...ter_B00IFR4LLE or the UAG Clear Case http://www.amazon.com/URBAN-ARMOR-GE...tc+one+m8+case but I heard people saying the Spigen scratched their edges. So I wanted some opinions on cases that would lease damage the phone