Hi, I need a protective case for my iPhone 4S which is not too bulky. I already found 2 good cases but i can't decide which one i should buy: Otterbox Commuter: http://www.otterbox.com/iPhone-4-/-4S-Commuter-Series-Case/APL4-I4SUN,default,pd.html Ballistic Shell Gel:http://www.goballisticcase.com/products/iphone-4-ballistic-sg-series-case I like the good corner protection of the Ballistic but i am not sure if it has enough protection for the screen. The Commuter has a good protection but the corner protection is not as good as the Ballistic. So which one should I buy? Can you help me?