Respectfully disagree. The potential for global economic rewards and an increased and modernized military of conventional weapons put Iran in a very, very good position--for Iran (and Russia).
The last thing they would want is nuclear war. They won't need it.
Again, my $.02. :-)
You assume their leaders are rational. Time will prove one of us right.
They want nukes so they can give them to others (terrorists) for them to use it against Big and Little Satan. Think proxy.