I'd consider them 2nd in this regard.North Korea with their Nukes was and remains a bigger threat.
IMHO, Iran is much more of an imment threat to
stability than N.Korea. Though that could change later.
Developing Nukes for so called "peaceful" progress while
publicly urging its constituents to kill infidels(anyone that
doesn't praise Allah) while calling for the annihilation of Israel.
Also arming the insurgency in Iraq and the arming the
Hezbollah in Lebanon is "hands on" evil in progress.