Is it silly to upgrade to 5s?

I have a 5 month old iPhone 5 that someone may purchase from me for $600 & and iPad for $300, is it silly to do all this just to upgrade to 5s? No rude comments please.

I have the 5c and my guy has the 5s… I can't get the lifeproof case that he has bc my volume buttons are different… His is more structurally stable than mine, and it's a bit quicker to download. Other than that and the color it was just a lot more money for the same one. Hope this helps a little