Couple of problems with your scenario. One, despite all the talk we have never won a conflict on airpower alone. Your scenario would bomb the crap out of Iran and leave a hostile government in place. You don't think they won't find a way to get payback? Second, look at Iran's best customers for oil. UK. Japan. India. China. All are on the list. None are going to support us in this. So you would have us go to war while still trying to prop up Iraq and I'm pointing out that we don't have the troops, or the allies to do it.
I didn't realize that we have a friendly Iranian government in place at the present time. That is indeed new information.
I am not saying nor do I think it wise to even "try" and win a conflict or a war or anything of the sort. (we certainly should not try and occupy the country)
All I would want is that we knock out Iran's nuclear bomb making capacity.
As for your point about the UK, Japan, and/or India not supporting us -- I think they would change rapidly if faced with the REAL possibility of a nuclear bomb making factory up and running by the Iranian government, especially a government which is likely harboring many of the top Al-qaeda leaders of today.