This comes from an article in the Oklahoman:
Golden State and Miami will be the most likely landing spots for Kevin Durant should he choose to leave Oklahoma City as a free agent, according to an agent speaking on the condition of anonymity.
"Golden State and Miami become the only real players," the agent said. "It's too hard to justify a move to Los Angeles [Lakers] or New York because they are not close to winning. Houston's out." To be clear, this is just the viewpoint of another agent in the NBA, and this agent does not have any direct knowledge regarding Durant's decision making. That being said, the logic here is sound, as it wouldn't make much sense for KD to opt to go through a rebuild at age-27 having never won a championship.