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Browse credit cards from a variety of issuers to see if there's a better card for you.
Visa Traditional - Traditional Rewards - Premium Rewards (Signature) http://usa.visa.com/personal/cards/benefits/index.html
Mastercard Standard - Gold - Platinum - World - World Elite: http://www.mastercard.us/credit-card.html
Visa Infinite is available in many countries, including Canada and Mexico, but not the USA. Here is the link: http://www.visa.com/infinite/
Most countries seem to offer either the signature or infinite but not both. For the vast majority of people, I don't think they'll really notice a difference.
Visa Signatures are so easy to get these days, and the same goes with World MasterCards. Even WEMCs aren't that difficult.