I have an AMEX Delta skymiles card and, what I like about that is that I can turn miles into money towards flights. I used to use it a lot when I was single and flying to Atlanta a couple of times a year to see family. I hardly use it now, but the miles / value don't expire.
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DH has a Discover card and gets cash back, which is a nice option at Christmas.
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I believe both are around 9% APR. APR shouldn't be an issue, though, if you pay off your balance every month. 4951