Should I get the apple iphone 5 or 5s?

I'm getting an iphone for the first time, and I want the newest one, so I should get the 5s. However, I would have to order it and pay more each month as well as wait four weeks to get it. I could theoretically have the iphone 5 tomorrow, and it would be $100 cheaper up front and 5$ cheaper each month. What should I do?

If you can afford it, get the 5s.

If you don't have one then go with 5, otherwise you will be waiting at least a month as you said.

You said you want the latest one, that being the 5s.

As far as costs it depends on if you think you could make them or not in the long run. I would say the 5s is worth it though.