Which iPhone, 4S, 5C, or 5S?

I have an iPod touch 4th gen that I have had for 2 years.iOS 7 will not be compatible with it, and now I will probably not get updates on my apps. I was also not very careful with it back when I got it, so it is filled with corrupted files and it is scratched and the camera is blurry.

I do have a basic phone with a slide out keyboard I have had for 3 years. It is very dented, scratched, and its been in the rain and dropped. The keyboard has a spring that pops out, and the touch screen is very messed up that I can barely use it anymore.

I appreciate having these devices and I know I'm very lucky to have both a phone and ipod. But both are kind of old and damaged and I hate taking both phone and ipod everywhere I go. I will pay either all or half for this iphone. (Christmas). Which is better for me?

IPhone 5C because it comes in with a bright variety of colours & it has iOS 7 installed on it as well