You may think the Amex Platinum and Business Platinum are too similar to justify having both, but I find their unique perks ...

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 American Express Gold Card falls between entry-level and premium cards in terms of annual fee, perks and earning rates.

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 ...