My opinion?
North Korea needs to get the fuck bombed out of them. Just to let them know all their belligerent posturing counts for jack shit in the face of a modern military machine. I guarantee the only reason it hasn't happened is China. I've no doubt we could take them in battle as well, but it would be far more costly than if NK was standing alone. Even so, the chinks have to be getting tired of playing big brother of an asshole sibling that invites trouble upon itself. NK banks on their assistance. Without it, there'd be far less shit-talking from their corner.
I guess it all boils down to whether or not China is committed to supplying military assistance to a government that for all intents and purposes has failed miserably and stands only to be a logistical drain on China's own resources for as long as they choose to stand by them.