What iPhone should i get? Moneys worth?

I'm looking at the 5s and 5c

the 5s is a bit more expensive than the 5c but is it worth it to get the latest iPhone instead of say get a 4s?

i have never had an iPhone before

i have a macbook air and love it, so am wanting another apple product and i currently have no phone so need one

I have itunes swell so thats another reason i'm opting for apple iPhone

is it worth it to spend the more money on a new 5s or 5c than the old 4s?

I think you can go for iphone 5s. If you're interested in buying iphone than better choose one that is more worthy and functional.