From 4S to 5S?

I am seriously contemplating if I will change my very first iPhone handset which is a 4S (from being an Android user for three years) to 5S or at least 5C this coming April of 2014. 

I am loving the colors of 5C and I believe this will mix well with my personality and style. 5S is more sophisticated, so whatever comes first, I should be on the iPhone 5 series side very soon.