Santander currently is running a credit card deal for their Bravo card, where you will get 10,000 bonus rewards (worth $100) when spending $1,000 in 3 months. I like this card because you earn 3x rewards from gas station, supermarket and restaurant purchases which is the highest while these categories are missing from a quarterly category from the other credit cards. The bad thing is there is a $49 annual fee after the first year since the extra20 checking and savings accounts from Santander does not qualify as a Select account. The other option to get 3x back for supermarkets is the American Express Blue Cash Everyday Credit card and 3x back for gas using the Bank of America Credit Card.
Also as a Santander Banking customer, paying the Bravo credit card bill is as easy as a internal fund transfer.
For a complete list of credit cards and their rewards, check out 2015 Credit Card Benefits-At-A-Glance.