Should I upgrade to an iPhone 5 or 5c?

I have a 4s. Which do you suggest and why? 5s isn't an option.

IPhone 5. The iPhone 5c cracks much easier, is difficult to find a quality case for, and if you crack it once and get the screen fixed there's a high chance the screen will begin to pop out of the phone itself. I dropped my brand new iPhone 5c on soft carpet flooring with an otter box, that was $50, and it completely shatter. When I got it fixed, the screen began to pop out of the phone and the same is happening with several iPhone 5cs belonging to my friends.