In years past, our best power couples have been rolling in money. After all, cash and influence are synonymous in this town. But this year's couple, Lizette Alvarez and Don Van Natta Jr., have a different kind of capital — the cultural kind. These two writers have long histories in Miami. Both are former Miami Herald reporters who went on to greater things. They spent time in London and Washington. They brought home amazing awards and covered subjects such as Rupert Murdoch, Monica Lewinsky, and Congress. They wrote books. They conceived amazing kids. Yet they've never been pretentious or haughty. They're the kind of people everybody should meet. These days, Alvarez is the Miami bureau chief for the New York Times. And Van Natta works for ESPN while hatching ideas for volumes that continually fascinate the masses and nail the Zeitgeist. Their names will never grace a tony private art collection, but power isn't something that can always be measured in Matisses or Picassos.