Iphone 5 External Case and Applecare Plan

Hi,

I had purchased Applecare plan when I purchased my iPhone 5.

I need an advice that should I cover my white iPhone 5 with a case, having purchased Applecare Plan which is valid for 2 yrs.

The external cases which I come across, somehow hides the sleek design of iPhone 5. Right now am in 2 minds, whether to put a case or not.