These three credit cards offer big rewards for travel, groceries, and another spending category of your choice. See if they ...

The card's rewards structure isn't the easiest to remember. But its useful bonus categories, flexible rewards and outstanding welcome offer make it a top contender among cash-back cards.

The card earns bonus points for travel and dining-related spending, which can be redeemed for more value through Chase. It piles on the perks, too, but they come at a price. With a big sign-up ...