Get the Starwood Amex, then the Hilton Visa card.
If you fly Delta, and do a lot of shopping in hardware stores, groceries and some other vendors listed in their website, one major advantage is that they do have their double miles promotion, and at least once a year they have a double miles promotion on anything for a month.
It can accumulate miles very fast, unfortunately it does have a high fee, but it might be worth it.
Hope this help.
Oh, and I almost forgot, Welcome to Flyertalk
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Another evil plot for world domination through the use of points and miles.