Would the 16 Gb iPhone 5 white be?

Enough storage? I keep my music on my iPod.

I absolutely think you should always get the highest storage you're budget runs to because there's nothing worse than getting a phone or tablet and then realising there's not enough storage for the things you want on there.

If you only keep music I think that is enough for you.

Of course that would depend on how much music you have & plan to put on the device as well as what else you intend to use the iPhone for