On a checkout page we offer the ability to store credit card information. Once a customer has stored their card(s) we need to offer them the ability to choose which card they would like or add a new card.
Which would be a better interface:
1) A radio list that shows each card that has been added, with the last option: "New Credit Card". The "new credit card" option would reveal the CC inputs.
-- OR --
2) A drop-down defaulted to the most recently used card that when clicked reveals all other cards as well as a "New Credit Card" options. The "new credit card" option would reveal the CC inputs.